Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcec7c3cc679e5d7…

MALICIOUS

PDF

71.7 KB Created: 2020-12-16 14:55:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ec3cc911d66a0926bceb64d600fb8e65 SHA-1: 758f751f8ba44316cf63a09e8e3c04a7d191d50b SHA-256: dcec7c3cc679e5d722af9c5f707c233057426008853eb9445a57aa1b77676fb4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' indicating a large number of outbound links. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically related to phishing. The embedded URL 'https://traffking.ru/123?utm_term=the+north+face+surge+backpack+review' is a primary indicator of the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=the+north+face+surge+backpack+review PDF link annotation
    • https://laxomubidaxudov.weebly.com/uploads/1/3/4/4/134475580/8495303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393208/normal_5f9e35d2a5838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455405/normal_5fc3521d9c2cf.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/56ff7a44-3267-4095-915a-3d170d8f6121/zitogabepajasewanikija.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/13470394653.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/polaroid_white_mailing_labels_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a5c421-614f-44c8-b615-4ab2b3bc3d3a/pujitisitanedoruwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/256f15e8-8323-4007-a831-363c87db9c2b/87225524683.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/tabobidezokeboxep.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/apoorva_raagangal_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/27461737892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf96747-79b5-4ee7-9d74-f0ee09965bf6/forgotten_realms_campaign_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/vipibumunewuwowogedeku.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc588470b6b03258f54bdbe/t/5fd1e225a9eaf43bd856e617/1607590441329/311283839.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 5552 bytes
SHA-256: 23d8ddd9a9240c942b9025c143a398b66734dab7a4f38fc8710f17af489cb5e1
font_01_sfnt_off0000efdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDF 9884 bytes
SHA-256: d38b7540ba87d183d5b02b49bf6ea91f4bca2d053e4f9cfa7de64799e4a53901

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