Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b60ec4b832c53e…

MALICIOUS

PDF

103.9 KB Created: 2021-04-03 03:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2c08226ce35b34256a4447e7ffd20c55 SHA-1: 8209664eb287282612e2a4aa65a5c1a262469865 SHA-256: 32b60ec4b832c53e88143471a0dade629abfcf27ec386c87f8549b1ec658d8a6
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/wix?keyword=kara+turkish+meaning+in+english PDF link annotation
    • https://lujoduxatodovaw.weebly.com/uploads/1/3/2/3/132302833/likesibapovuwoxu.pdfIn PDF document text
    • https://cdn.sqhk.co/wugotiparo/GnjaJEh/80966309777.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/lhgW5x2/99483929494.pdfIn PDF document text
    • https://cdn.sqhk.co/doxinotilid/5ifhcgi/todiwugevobobotovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_60617150bff33.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/iggierK/lizuni.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/hlibjV4/paven.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/ljjbU1n/how_to_download_toca_life_pets_for_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wekonexiw/dhhjbhi/10583997906.pdfIn PDF document text
    • https://napuguzexavuzes.weebly.com/uploads/1/3/4/8/134875267/4ad2f9b4bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368984/normal_604d2060b820a.pdfIn PDF document text
    • http://taxafig.66ghz.com/beggar_my_neighbour.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/MNjfhcL/bluffton_sc_restaurants_that_deliver.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384652/normal_602f68461d349.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/3jgifjj/cloud_9_vapor.pdfIn PDF document text
    • https://rafopovuweke.weebly.com/uploads/1/3/2/7/132740485/nurilagigubodabomelo.pdfIn PDF document text
    • https://zazobowelukoki.weebly.com/uploads/1/3/0/9/130969428/wiwesuredo-tivif-saligazazazunon-zobiwasebis.pdfIn PDF document text
    • https://tunibedexorole.weebly.com/uploads/1/3/5/3/135350281/danatuludak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://vifowas.epizy.com/compartment_form_punjab_school_education_board.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_1af76aaf70294eea89453f5df4812303.pdf?index=trueIn PDF document text
    • http://rukaxamusotaz.rf.gd/38870915287.pdfIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_b7a6aede92e24bfd856b07d9ddb03df8.pdf?index=trueIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_acb3b13d4ebd441e9063423165968fa8.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_9bc949b261754396850af8ec37dd36b9.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off00016c8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16C8A 16448 bytes
SHA-256: 2c26834d90ec7a8b785a51312dcd2b49150634b14d80a364c91a2eb14f249a1a
font_00_sfnt_off0001008d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008D 7200 bytes
SHA-256: 8ef741fca4b1828f6892bc7a77ed818f00c956ee6ee8f6c3ef809f4c9f6379d5
font_01_sfnt_off000111f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F3 3360 bytes
SHA-256: ad57d4bdae82d887840d252e100f1d413e74ce73d53f5827be7a732bc07cd208
font_02_sfnt_off00011df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF7 5132 bytes
SHA-256: c68b86e227a2dd0f5033cc469dd12b43e15e89d2ff21eb9e9cccfd074c357d42
font_03_sfnt_off00012f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F43 2396 bytes
SHA-256: 40e1b1157a2e42bb249634868dbdb73633dab847082f517aad85bbde58e08abc
font_04_sfnt_off000139a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139A5 17944 bytes
SHA-256: c497464cd70e4bdf6dd87ad49d7652b89948c5bb9136e65e67b657874443e947
font_06_sfnt_off00018330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18330 2644 bytes
SHA-256: fb17bd8df123a2a8bc46538056381b86c7103e70452c0c5b1b513750e0959082

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