Malicious PDF — malware analysis report

Static analysis result for SHA-256 549f065c7092210d…

MALICIOUS

PDF

77.8 KB Created: 2021-02-21 11:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ba8b9c8c890575e7e0a5a8f7ac9c630b SHA-1: 84d3f9910e244ad57e41f4b89d2bf995b0aee302 SHA-256: 549f065c7092210d6d399f207976c30514eae702d03a16d2d661dca2ea568d39
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ML_NYX_PDF_MALICIOUS and ClamAV detections strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malicious content delivery mechanism, likely initiated via spearphishing.

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://seumenha.ru/123?utm_term=mansions+of+madness+expansions+review PDF link annotation
    • https://cdn.sqhk.co/kosenopelid/a2idja1/51317790099.pdfIn PDF document text
    • https://vabudefun.weebly.com/uploads/1/3/0/7/130775589/1567068.pdfIn PDF document text
    • https://figuzejigof.weebly.com/uploads/1/3/4/6/134644002/eadf96d5ea8c8.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/ghItVgc/srs_surgery_cost_canada.pdfIn PDF document text
    • https://muwujexowosis.weebly.com/uploads/1/3/1/4/131437891/9748557.pdfIn PDF document text
    • http://iqecoportal.ru/59894034513yz0jn.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/sanise.pdfIn PDF document text
    • http://findssldz.xyz/how_do_you_remind_yourself_to_prayvjbvm.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/iMiagfS/project_makeover_game_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/jgfDzhh/blind_side_eye_of_the_storm_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/wujukipako/AA9ijss/drop_it_song_name.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/it_security_analyst_salary_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/gevufojujikagazu.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/wafomev.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/barcode_scanner_using_camera_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/jatexuzik.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/physiology_ak_jain.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/advanced_systemcare_11_pro_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE713 5088 bytes
SHA-256: d88f1b07b25ad346a3c0951a244ddaf119b2efff1585c7eedd5760d64690fda2
font_01_sfnt_off0000f851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF851 10240 bytes
SHA-256: 53b0b7a9616e5f544303eb5206512c988c43e519e6d31bf09f4cfff817efd286
font_02_sfnt_off00011b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B62 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.