Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cc33e8af0f049f…

MALICIOUS

PDF

105.4 KB Created: 2021-03-17 09:23:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: aa547a2e83f2f2809960af3e7035eeb5 SHA-1: 34913efcca7149942871dbf11c8b3fce3e364b53 SHA-256: 22cc33e8af0f049fdff5bab6d46ce85117de3f3a643cac1b316fa7f4901b4e36
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed for SEO manipulation or traffic redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jacksth.ru/wix?keyword=sexus+henry+miller+pdf+ita PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5fde852a723d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465025/normal_5fdedcf06a4ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454543/normal_5fed10622de4f.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/44ed3da9aab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501789/normal_604ef12183694.pdfIn PDF document text
    • https://semetipakes.weebly.com/uploads/1/3/0/7/130775831/xulozub-memakipikituz-nifaxin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457876/normal_601e2f7f913f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5fd77945e2f35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_60324939a4bdb.pdfIn PDF document text
    • http://tubunasozejut.22web.org/cs_go_android_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374372/normal_6036f5300323a.pdfIn PDF document text
    • https://sabalijazot.weebly.com/uploads/1/3/2/6/132695986/pabezajonaxes_pafimix_xojek_vupozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454544/normal_5fe6fc04c163e.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://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_dd61ebf8ba114a3d98b6ec7af388f6cd.pdf?index=trueIn PDF document text
    • https://3f7ff619-1e23-491c-a925-ddda4d79b49c.filesusr.com/ugd/79c22a_f307697efe5d4a04aa6176a51b9c96ab.pdf?index=trueIn PDF document text
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_1b4c52df75334b768c86281bf66f409e.pdf?index=trueIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_0abb11c2c17141d0ad811eeaeefd3931.pdf?index=trueIn PDF document text
    • http://tofimojevor.epizy.com/76380272849.pdfIn PDF document text
    • https://d0aee4dd-c5bf-4c29-adcf-3aa844f59ef3.filesusr.com/ugd/193d13_b3f0306f1d734cfaa7264664107d6aef.pdf?index=trueIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_57beb356ac6a45a58095fa12bb9f0269.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000140d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140D1 3936 bytes
SHA-256: 6d97f05aab65a58930a1c23e11e417af4f6f9e60ab0c60145281b9650b7923a3
font_01_sfnt_off00014e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E95 5324 bytes
SHA-256: 82beb3de7f7235e13adcca02e8a59f05481dd3760a3036fa49116c0a08626d41
font_02_sfnt_off00016079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16079 12864 bytes
SHA-256: 719fedfcb103fa38447618333e2c4e42352bca0df33e4693c3a3a3e39dd820b2
font_03_sfnt_off00018996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18996 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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