Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1cf70a27490aba…

MALICIOUS

PDF

87.1 KB Created: 2021-05-04 10:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3f5f38e6a0a0ced98b60ac65b6d5b7c3 SHA-1: 129a50514e6583d24f35e38ec9098110d31944b1 SHA-256: ab1cf70a27490aba3b77566df54561d8c0db41b7d38c032a78e3f63f67e46140
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

Heuristics 5

  • 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.
  • 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/strik?utm_term=motorola+dcx3400+manual+pdf PDF link annotation
    • https://madajeguruxe.weebly.com/uploads/1/3/4/3/134348767/498be17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427267/normal_5ff829789cf64.pdfIn PDF document text
    • https://madimikelijexev.weebly.com/uploads/1/3/4/7/134717844/tifonifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455399/normal_600c479582fc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413703/normal_604e139e0a781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393186/normal_604dd0aa11569.pdfIn PDF document text
    • https://nenubijul.weebly.com/uploads/1/3/5/3/135393623/xajuxebuwefipe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_600b6f3ad3db5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455642/normal_5fe12930e0858.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zowejunef/charlotte_s_web_script.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/which_online_business_is_most_profitable.pdfIn PDF document text
    • https://aaca6425-83b8-4992-a49d-2ec8a2d61848.filesusr.com/ugd/304e3c_fc467b3add8440cea48bc981491fe243.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lusabifef/86027915869.pdfIn PDF document text
    • https://0ed30ddb-3df1-4505-9e4e-3e87fc6d20ea.filesusr.com/ugd/f043c1_6df27fefe9a54bfe9601a7b00dd81cdd.pdf?index=trueIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_1263f1b899dd403a80f27ac5892ba575.pdf?index=trueIn PDF document text
    • https://40052bae-d6b0-4be3-9c84-96956a804c69.filesusr.com/ugd/32907c_13a023d60c9b4fbf9146a2f380e080ad.pdf?index=trueIn PDF document text
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_20b5396535ad4a1ca28c0da7794b5b2f.pdf?index=trueIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_469511e6316148ac88b51695ecd40b64.pdf?index=trueIn PDF document text
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_57db2c5acbb0422a9ceff8d37f3acf12.pdf?index=trueIn PDF document text
    • https://2e96d104-cacc-4af9-914c-411927af6089.filesusr.com/ugd/0f866b_5753617deccf4be3a247bf864e4e6b91.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nemafu/wubiz.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/crack_rhino_5_64_bit_windows_10.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11385 5592 bytes
SHA-256: 63379ccc5a9466f17984ecee1f42815f76f2ae4855269cd42b005b1eaa622072
font_01_sfnt_off0001268d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268D 11760 bytes
SHA-256: 2acad0bd5e7317a287c6a3c0b8d6f4746ebbd6ecc2b3a891bc95df570f87d012

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