Malicious PDF — malware analysis report

Static analysis result for SHA-256 300b294c413583b1…

MALICIOUS

PDF

72.8 KB Created: 2021-06-11 14:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 39669e6478a1d1bd14b3464999ef4f2e SHA-1: 8e3aab5090e4f9ae8e02761429979d43f0298c2d SHA-256: 300b294c413583b1b4afc3c5912bed37d27c9bdbb22a0df45fb058784e46ee09
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 0.9997

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://drafthe.ru/pbw?utm_term=cheat+on+traffic+rider PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415068/normal_6066856505ebb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407318/normal_60157b3dd92f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479214/normal_5ff8c7697cbc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390095/normal_5fd1d0b849d77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425768/normal_5ff928d11263e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409243/normal_5fe73e328765b.pdfIn PDF document text
    • https://nepexinis.weebly.com/uploads/1/3/1/4/131438592/najixuzanixutaz.pdfIn PDF document text
    • https://bopunesarikimar.weebly.com/uploads/1/3/1/4/131453984/217907703e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475203/normal_6037c17e509e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c22d7e-eb26-485f-87a7-301a0f9f706c/31220786082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0054d714-1fa9-4b2f-ab5c-66834c1b29c2/luzorezawobetuwivexekov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc16355-0b75-4246-9fa7-8e6a9929f176/requirements_for_a_general_contractors_license_in_georgia.pdfIn PDF document text
    • http://deburajuza.pbworks.com/f/71841822754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff73a9cd-17f4-4dda-b9dd-ff7db1a9f2cc/decomposer_in_the_sahara_desert.pdfIn PDF document text
    • http://kekirow.pbworks.com/f/54737824106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db1faf5f-9770-43c0-b8b2-389a2abf6f8d/keratuxumeguzimepatose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed4c0b3c-1889-487e-b494-89ccd53b43f1/97639934368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eadb162-6189-4d49-9db5-af5d275e2166/56038369340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fb73661-9b7b-449b-9aab-6d24bf66501a/20599511732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea14d3ff-6401-4550-8d97-483bd9c96b7e/linksys_wrt120n_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d6341df-4bd4-47a9-8c5a-837d7f20be21/how_to_recognize_micro_expressions.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_off0000e148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE148 4804 bytes
SHA-256: 111cc26f7de85e75220d03369e20af7e47c523df72a9306a9d44712d24f8d804
font_01_sfnt_off0000f195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF195 10344 bytes
SHA-256: 0d087f42119ed4efcdd61d78d6275a7a248b80bd70640a1ed74186dd36b97d87

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