Malicious PDF — malware analysis report

Static analysis result for SHA-256 106e48fff4226720…

MALICIOUS

PDF

85.6 KB Created: 2021-03-02 13:17:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2acbcdaae4f98ef3a91dda3099f9a826 SHA-1: 22f52605e9a70e10f571dc15c7bfa76851499787 SHA-256: 106e48fff4226720dfb5f0796bee74fb98fbacbbc72a1ff6c02b4f8fb80870c0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDF files, indicative of a link farm. One of the primary URLs, https://lozipotod.ru/strik, appears to be a malicious domain used for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malicious content via the linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/strik?utm_term=who+child+development+milestones+chart PDF link annotation
    • https://diwuxofemuji.weebly.com/uploads/1/3/1/4/131407179/wagidiwetuju-venimavuxufuzuv-galufolepetedib.pdfIn PDF document text
    • https://xiforamuti.weebly.com/uploads/1/3/4/6/134611992/c0e8816490e5.pdfIn PDF document text
    • https://tumafivefaj.weebly.com/uploads/1/3/3/9/133999435/6852912.pdfIn PDF document text
    • http://betixisu.22web.org/bobumisewu.pdfIn PDF document text
    • https://bujubilefo.weebly.com/uploads/1/3/1/4/131406518/7ab8eff8d9c75.pdfIn PDF document text
    • https://susakatevasek.weebly.com/uploads/1/3/4/8/134871092/8952099.pdfIn PDF document text
    • http://gogodolajukapob.22web.org/gofuregikonarumofaputus.pdfIn PDF document text
    • http://fuziral.iblogger.org/tepco_fukushima_nuclear_accident_analysis_report.pdfIn PDF document text
    • https://mupasifuv.weebly.com/uploads/1/3/2/6/132680827/jumugowalidazot.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/voxipanovigepiv/23306991905.pdfIn PDF document text
    • http://labutebumir.rf.gd/6427470674.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/81573836117.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/cashflow_101_board_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/anonytun_mod_unlimited_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/android_api_level_21_version.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/candy_crush_soda_for_windows_8._1.pdfIn PDF document text
    • http://juxudawalugevop.epizy.com/53102249413.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/gujipogifukiduxifiz.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_off00010429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10429 5176 bytes
SHA-256: 578e5912594b4d4ad66bef823ec2a0fb4e8eb390a87e41796630ac4c340bbf24
font_01_sfnt_off0001159c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159C 10788 bytes
SHA-256: 0897b993585e51044e2d1f05e86cf1fc377b64f46fdeef3387efcde2050b903c
font_02_sfnt_off00013a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A96 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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