Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa674be819ec86b…

MALICIOUS

PDF

126.1 KB Created: 2021-03-03 18:34:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: c4381942539755829ddfa9de7c12ba6e SHA-1: cf09ba85088863ca1af40cdc2bc040569bdfdd58 SHA-256: 0fa674be819ec86b480cf5bdb19f2295d69c77704a2c5eed66f1c07a4f98b780
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, pointing to various PDF files. One of the primary URLs, 'https://ponafet.ru/strik?utm_term=list+of+books+by+orhan+pamuk', is suspicious and likely leads to a phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or SEO-based malware lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/strik?utm_term=list+of+books+by+orhan+pamuk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393197/normal_603e61293a867.pdfIn PDF document text
    • https://gebifafotuzuwi.weebly.com/uploads/1/3/5/3/135324040/pisesajodusediv-dogamiwomuwa-tigavotiwem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379984/normal_5fee9e8b27702.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486054/normal_5fe56d26efbfd.pdfIn PDF document text
    • https://viwoseloza.weebly.com/uploads/1/3/4/8/134861971/4089441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414679/normal_603c80b87a33d.pdfIn PDF document text
    • https://samaruwopag.weebly.com/uploads/1/3/0/7/130738554/lajunamogiduwoguvav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://movafomuwexowix.epizy.com/xitenozurewetogavefuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/uc_browser_app_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/pelune.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/jevuxojoxizepojun.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/29216526198.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/72208220391.pdfIn PDF document text
    • http://xipumipofamas.rf.gd/pronouns_worksheet_for_grade_12.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/gladiatus_guide_stats.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/affairs_of_the_heart_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/halloween_math_worksheets_6th_grade.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://scripts.sil.orgIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17520 5120 bytes
SHA-256: a3e52208543b704d5497a38de4710faeb4abc6586650b437e4dc2fd88be5c8d1
font_01_sfnt_off00018641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18641 4412 bytes
SHA-256: 4adba64fa14d797f8a234903ae03951ab21f54ed1e0fb39d507aa3d65cd3806f
font_02_sfnt_off00019642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19642 14920 bytes
SHA-256: 887a61781a786c83139050904b134530f96f745c71d0caf3352f13522bd7baa4
font_03_sfnt_off0001c1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1CD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
font_04_sfnt_off0001cfcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFCC 8448 bytes
SHA-256: 33f72f87ee5afd4c8120957ccb9a6b27148f44384b042645239f15873788252b

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