Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb9977aabc66763…

MALICIOUS

PDF

44.1 KB Created: 2020-11-05 16:00:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 915ac20b2a6f550549453a46553261c8 SHA-1: dff549afbd1d0118bebf96e027fd9a832de9e05e SHA-256: 2eb9977aabc667630aa3679292d1982cab99cf22769d44d09ccf8c3844a75b74
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?keyword=knowledge+bowl+washington In PDF document text
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/zurogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413967/normal_5f99d784b8d2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411709/normal_5f952c47cf131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402721/normal_5f9938b21b1a6.pdfIn PDF document text
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/xigafam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412606/normal_5f9814d976de6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_5f9b0a9eb9c35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369501/normal_5f91efc082183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_5f8c3e4445aa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f885a786d255.pdfIn PDF document text
    • https://xulajaxosu.weebly.com/uploads/1/3/4/3/134366267/deteruz_rajiwukizetu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/los_amigos_high_school_phone_number.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB9 4980 bytes
SHA-256: 7de6bd32c05703ba5df34768509ac24ed23e94227f4fe3a3772bb9f0e5d48b6c
font_01_sfnt_off00006eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB7 12084 bytes
SHA-256: e5bff921479b7ad8a9ef84b37944cbc5601a48b941bf88361b77778cda7f9c9b
font_02_sfnt_off000095f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95F4 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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