Malicious PDF — malware analysis report

Static analysis result for SHA-256 097bca1fda2c2854…

MALICIOUS

PDF

84.9 KB Created: 2021-03-22 15:51:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 021b2871f39e9f701e3add5c2bcd3b0c SHA-1: a7342ca5b87eca26acb8cd653742c07beb969887 SHA-256: 097bca1fda2c28542e9b94cb6f37e2237d83a3e36c754abd827b3532bcd113a3
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to attract traffic or distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wix?keyword=block+strike+hack+apk+android+1 PDF link annotation
    • http://legegapepapo.medianewsonline.com/tumedeji.pdfIn PDF document text
    • http://kegetisa.mygamesonline.org/autocad_2d_tutorial_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485296/normal_5fd7ebb685dcf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446511/normal_5ff574ea8cc48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380380/normal_6045721ab3713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389606/normal_6030e1bd1a6a3.pdfIn PDF document text
    • http://eurosett.net/67467519575joeqt.pdfIn PDF document text
    • http://3-bureaureport.info/finite_element_analysis_projectnrxhz.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/most_common_themes_in_childrens_literature.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490720/normal_601a10c88c6e7.pdfIn PDF document text
    • http://lazadacostumercenter.com/samsung_ce0168_tablet_specificationsmrhxz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_8cf0c476eaf24d289597a749c63b3c7a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/129605fa-465d-402d-923d-ae67e9b22809/craftsman_front_tine_tiller_6.0_hp_26_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e577e4dd-0a8d-4ca7-b3f9-fbad1c84218c/ruboxawotesosokivojotosuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07b25532-32de-43d5-a7d1-0e599b70adce/how_to_tell_if_im_an_infj.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/59116502747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac165dc-c1ac-40ff-8b3f-6836dc05783c/29662739328.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/new_nice_guidelines_2019.pdfIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_9294adfbd8964bc6ace51f8132372cfc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/50520299322.pdfIn PDF document text
    • https://9ec55029-67b1-4fe0-9a5d-40fd638ac594.filesusr.com/ugd/dc5a51_01926806b9a945ad9598c5d5d1a17412.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/53d566d3-ec6c-4937-b9f6-f06edab2b1c7/a_prayer_for_owen_meany_chapter_3_quotes.pdfIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 5328 bytes
SHA-256: 7e95328d83f6588ff7c226295411369803727cd2ea7d2a35f62df3b0b0083cf5
font_01_sfnt_off0000fa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 3420 bytes
SHA-256: acdccf536c739b3adce136b561d9f095f2751846d3e3130c02b30136dc238b6e
font_02_sfnt_off000108b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B4 12220 bytes
SHA-256: ffe287491c5cacfb5b2894f97bf62e62f933cd67099b19fc3e53ef97cb3923c0
font_03_sfnt_off0001310c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310C 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940

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