Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb4e80ebdf96fe2…

MALICIOUS

PDF

87.2 KB Created: 2021-02-17 09:54:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: ef61206e099998df2ebdbfcf5c7bb4ff SHA-1: 3e2f72c8e2af3b0140384566cbb84143541b5d92 SHA-256: ccb4e80ebdf96fe23b94629be17abda3d0a3b8556e50784508ff4e1dd8d76b8e
156 Risk Score

Malware Insights

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

The file is detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous external links, with one heuristic specifically identifying a large link farm pointing to other PDFs. The document body, though heavily obfuscated, suggests a lure related to an 'Atari 7800 rarity guide', likely to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://druttle.ru/wix?keyword=atari+7800+rarity+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474736/normal_6003b75f8d2d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490370/normal_5fd67dfb3bcd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465403/normal_5fcc1a32bc529.pdfIn PDF document text
    • https://tebideronapiza.weebly.com/uploads/1/3/1/4/131483209/kodifunoj_kopubogawofesi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485010/normal_6003a34a0c74a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499942/normal_601f2a8b27043.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412758/normal_5fed3c68eef4c.pdfIn PDF document text
    • http://nosaraxes.22web.org/ssc_stenographer_2018_application_form.pdfIn PDF document text
    • https://sagagokibifaku.weebly.com/uploads/1/3/4/6/134625973/7dae48c7af867.pdfIn PDF document text
    • https://bizavewes.weebly.com/uploads/1/3/5/3/135323934/8654552.pdfIn PDF document text
    • https://virenejamavik.weebly.com/uploads/1/3/4/1/134131854/lusedax_natifovupa_zumapovubajeson_rirazu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495043/normal_5fc7ef3b8a083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445337/normal_5fe8e969d5867.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
    • http://fabaxufonekefen.epizy.com/business_strategy_literature_review.pdfIn PDF document text
    • http://wativexapu.epizy.com/beyond_compare_free_with_crack.pdfIn PDF document text
    • http://xinasewaja.epizy.com/peronuxidowoxotowoz.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_off0000fe25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE25 4956 bytes
SHA-256: 16552a061035f121d3cc6e3481329374c0644c7bbb892c8d5b3b920280db151b
font_01_sfnt_off00010f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F16 16392 bytes
SHA-256: 4c43f8194fca4c7d2be7c6a6fdaceaf794ca03f9e7e05a65734be69cade4d424
font_02_sfnt_off000141b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141B1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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