Malicious PDF — malware analysis report

Static analysis result for SHA-256 175aec014d81564b…

MALICIOUS

PDF

78.4 KB Created: 2021-03-04 22:56:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3179dcb5f4551e8e1950a507cca4d8e4 SHA-1: 63edc72d3b2dcd26436c805a6bb0d0462fd2d260 SHA-256: 175aec014d81564b559fa3c5ff8316ee29c1396f847edae1d6edbe35af498bb2
186 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many pointing to disposable domains and employing SEO-like keywords, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious sites for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself is used to facilitate the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://soxebez.ru/wb?keyword=wd%20my%20cloud%20home%20app%20for%20mac PDF link annotation
    • http://xorimomupajo.scienceontheweb.net/38365602798.pdfIn PDF document text
    • https://funogefoxareso.weebly.com/uploads/1/3/4/0/134041001/2463424.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393188/normal_5fceee333ea9c.pdfIn PDF document text
    • https://mibofadap.weebly.com/uploads/1/3/1/6/131637701/kodenukunufub.pdfIn PDF document text
    • https://jitebemaduk.weebly.com/uploads/1/3/4/6/134692965/b105b7.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/dugoluvemutu.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/cannon_landmark_fire_safe_costco.pdfIn PDF document text
    • https://litorizifugo.weebly.com/uploads/1/3/4/0/134042617/jaxubisap_zonetipinaxam_sekamodelosuto_bebokemawagetoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403260/normal_5fd108f9aa242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427282/normal_603639892a5d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f42eb43-5283-44b9-a7d8-bbda2b89d87e/62547610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0129dee8-540f-4780-8d4b-d3d84ac2d7a3/womuvetalarifotofi.pdfIn PDF document text
    • http://telatojewoka.epizy.com/the_social_contract.pdfIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_38d5179a36f647ffb4d82491a7739f6e.pdf?index=trueIn PDF document text
    • http://naremijex.epizy.com/65674771345.pdfIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_a7f15ba832724f2a85392e69e73bffe4.pdf?index=trueIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_d6b7438b59a74b1d94f35617a5d8f9d4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1705d5de-d125-41c1-bec9-d2ca98b04291/place_value_worksheets_year_6.pdfIn PDF document text
    • http://jabenesejamuji.rf.gd/87808953525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c7f5a0-890a-4928-850f-769bf00b6b25/how_to_pass_ochem_2.pdfIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_c43b944f1c1443d485a8a7f0505d6a14.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 5332 bytes
SHA-256: 9a3dfe973f855b5cc1a5a21e54fa219fdd70f5a1b333c57561873326ad3421dd
font_01_sfnt_off000107d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D5 11072 bytes
SHA-256: 7fd80c77852d509225c6ab74183e3e785d5ec227ed5f58b35a9f658c2a19e7b0