Malicious PDF — malware analysis report

Static analysis result for SHA-256 22af576dfa788fa1…

MALICIOUS

PDF

80.8 KB Created: 2021-05-24 22:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6ce07082ffd5c99e912024abbc3b534 SHA-1: 2c17fa8e8a67e11db6fc3708534b37638cc13022 SHA-256: 22af576dfa788fa1d6a29ceba6e567ac78c4059b187839ef559302b0a0b2abdd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or malware distribution attempt. The PDF contains a large number of external links, with the primary malicious URL being https://jumiwimov.ru/strik?utm_term=smooth+pick+up+lines+for+him+in+spanish. The presence of a link farm suggests an attempt to direct users to potentially harmful content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=smooth+pick+up+lines+for+him+in+spanish
    • https://muxiduxipa.weebly.com/uploads/1/3/5/3/135319221/5863663.pdf
    • https://cdn-cms.f-static.net/uploads/4418365/normal_602fe3751351c.pdf
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/vewolekez_gomili.pdf
    • https://static.s123-cdn-static.com/uploads/4487632/normal_60019015334b3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vovuzize/62681307545.pdf
    • https://uploads.strikinglycdn.com/files/746b2a14-44b2-4211-b52b-13e338d843ed/v-stitch_crochet_pattern_for_baby_blanket.pdf
    • https://uploads.strikinglycdn.com/files/a73cd484-4623-4b9c-be53-1e8ff6f52a42/92133789708.pdf
    • https://uploads.strikinglycdn.com/files/eb52d6ea-894c-4d7c-be76-422f89353d03/956552744.pdf
    • https://uploads.strikinglycdn.com/files/2f61044b-ede0-4564-a309-75914a409daf/25630534894.pdf
    • https://s3.amazonaws.com/lolaritemukole/vukezebugu.pdf
    • https://uploads.strikinglycdn.com/files/d81e077f-6636-4fec-ac08-a1257dd25fbb/pamobibipabelunelatezomeb.pdf
    • https://s3.amazonaws.com/xurixado/maserati_quattroporte_mc_sport_line.pdf
    • https://uploads.strikinglycdn.com/files/a0131ec4-3442-4bf7-9b5c-89de8bce0cf2/27643638035.pdf
    • https://uploads.strikinglycdn.com/files/25398809-2b7d-4433-ad35-c8a33d43b3d7/zafopa.pdf
    • https://s3.amazonaws.com/kakef/xibajanetilu.pdf
    • https://uploads.strikinglycdn.com/files/1f2aea97-936e-44c0-b00c-be90110deca5/fegasopemexetajubitufe.pdf
    • https://s3.amazonaws.com/bufipevuril/ryobi_garage_door_opener_review_consumer_reports.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcc2.bin
27486768c850de6138473b76e4cc2103691f7c2f6a845d7889f0d87a53c14ce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC2 5424 bytes
font_01_sfnt_off00010f0a.bin
facfb3106c050471c24b3e38ceda243ae812ce565dd47ea27f51ee1bbb133a0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0A 11040 bytes

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