Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a98576b90674ff…

MALICIOUS

PDF

81.4 KB Created: 2021-05-13 08:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5b6f6625682d84ff1de79d0995c45fa6 SHA-1: b408a50425e3f56bde920e3dcf24ebfd9905bb51 SHA-256: 06a98576b90674fff2eb9d6bc75c91ac0c648520384d5288163f75d4f06f9cfa
186 Risk Score

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://lozipotod.ru/strik?utm_term=girl+with+the+dragon+tattoo+2009+review PDF link annotation
    • http://unityfree.xyz/wink_live_apk_for_iphonedmc3k.pdfIn PDF document text
    • https://cdn.sqhk.co/jawafurovif/ggecIbi/15497594107.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/ihiguPT/dalugugusepu.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/2hbodjf/97202175051.pdfIn PDF document text
    • https://cdn.sqhk.co/sevimifogu/h5ggegc/jojotufas.pdfIn PDF document text
    • https://cdn.sqhk.co/gujurolekuma/EhePibv/cms_conditions_of_participation_hospitals_interpretive_guidelines.pdfIn PDF document text
    • http://familyit.info/vojanelutopibunerb88l5.pdfIn PDF document text
    • http://acupofjacob.com/kibawumalb1g.pdfIn PDF document text
    • http://santecmb-sarl.com/xikulabudywc0.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/gfGQgf9/pusedojorasavebojodekef.pdfIn PDF document text
    • http://life-news.tech/agritourism_bookwvtlc.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/fxznhgc/niligo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_acf3087d60fb43f9a98c62c24c3622ac.pdf?index=trueIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_123c629eb25f45a4b4ac577a7d0ab1a5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6a8a78a-414f-46b2-b515-151797f37616/4234518015.pdfIn PDF document text
    • https://52f9d6e5-2fd5-4906-a030-4d12f703b62a.filesusr.com/ugd/297ecd_d08e57f7e9a64a24a1d019e76e0e8d9b.pdf?index=trueIn PDF document text
    • https://c482eaa1-e3aa-4fde-9473-53ba98cc9791.filesusr.com/ugd/94322e_cbb047c3c7e140fca794d400fb672d2a.pdf?index=trueIn PDF document text
    • https://b595a6f9-6bcb-48d8-acfc-7cb8c696cf55.filesusr.com/ugd/21f311_92c31149b85f4d51b52df5c9ad9334d2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab40ac51-4498-4740-a1b1-090b9441237c/salicylic_acid_face_wash_fragrance_free.pdfIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_fd28dbdbaf1e41f5bb9977dbd1e83aa3.pdf?index=trueIn PDF document text
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_bb0fb5cd437e4a83920b3e5a97afaa14.pdf?index=trueIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_40e16ea13a3e49a6aac601e3e803c4d4.pdf?index=trueIn PDF document text
    • https://4f870d4f-701c-4ec6-bbb3-7277acc5528a.filesusr.com/ugd/fdcb8d_41ae13600ab64b00bca7685b563c2295.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_off0000fee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE5 5520 bytes
SHA-256: e19ba71be92a5b06a0b417f14adaf81209595e4af9c18f397558448b2ad96102
font_01_sfnt_off000111b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B8 11060 bytes
SHA-256: 9532b5ebad784a3bd095258fde802cdc8aaba56eedcf5514c2a04e000eb04e6c