Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b70012ed621d6b…

MALICIOUS

PDF

78.1 KB Created: 2021-06-02 02:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8f68649569c30f511fe24857b3a25b81 SHA-1: 58549a1d25a2d24bdf9ee52d6c97d9433f5465d3 SHA-256: 92b70012ed621d6b48a5c49b249780392f8f6a2b4f28efc671a09f5b6d5a3912
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 0.9993

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://leonvi.ru/123?utm_term=basic+jcl+interview+questions+and+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370265/normal_60074da4d4155.pdfIn PDF document text
    • https://mikezibe.weebly.com/uploads/1/3/1/4/131453119/31ae29a2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486523/normal_605c77cb5b13b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491965/normal_600c5ffae1356.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406809/normal_5fe3c744eb9b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_6042b6bbad20e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459805/normal_6015c03ed5ed2.pdfIn PDF document text
    • https://xibatelilon.weebly.com/uploads/1/3/1/6/131637149/misesipigibajoxopeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388178/normal_604a987764707.pdfIn PDF document text
    • https://niremavepuna.weebly.com/uploads/1/3/4/6/134625676/9205147.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447096/normal_5fc8eae32af80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463812/normal_601150e0d2f60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459328/normal_602ce6b0d1840.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/ce20834c-7d18-4417-92e3-1fbc306e8037/how_to_crochet_easy_slouch_beanie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d64d7d-89e5-4197-8409-1d351644a662/rolovevexarozasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/235e68af-404f-4dc7-a55c-f48b146843a7/91789332163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77312aed-9ff6-4c78-88cd-8e88d36314e1/2020_kia_soul_manual_transmission_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45b8d50-2d40-4268-bc22-ca4f70be986f/how_to_crack_wifi_aircrack-ng.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a6f1327-f5b1-43b8-973e-1b00f32fb4d8/11821905961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db3c5d9d-d672-4af3-8b66-1b9956db3700/10357835024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28818e41-c284-4d6f-b6e7-a448bf8aa62f/char_broil_infrared_cooking_times.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d669d3f9-7888-498e-b386-552fa0423e32/gingerbread_man_story_sequencing_activity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/164890a3-d327-4fcc-a2f0-b576fc10dc4f/7068518643.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_off0000f424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF424 5336 bytes
SHA-256: a0f2c8ce7edea223566dd36aa1ec9a304de1b36d93cb6b4ad222f7545936d8da
font_01_sfnt_off0001066d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066D 10808 bytes
SHA-256: a2cfbebfa38345446bb12161cda901a2f60f897052ca10c25c4117e86e6d685f

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