Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3786a919228001…

MALICIOUS

PDF

73.1 KB Created: 2021-03-06 19:00:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 02abc31c2f6823aee2a3349972763708 SHA-1: 28dccf719aabf4b29d98567e1311ec0ba2acd989 SHA-256: fa3786a919228001a9d5a51721f9c6907fa2b9393b7658254306410834bf0aaa
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified the PDF as malicious, specifically flagging it as Pdf.Phishing.Trojan. The presence of numerous unknown URLs suggests a potential distribution point for malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/wix?keyword=carrying+capacity+graph+worksheet PDF link annotation
    • https://dudidupu.weebly.com/uploads/1/3/1/3/131380390/88ba7f6bf.pdfIn PDF document text
    • https://libepofiko.weebly.com/uploads/1/3/1/4/131483361/2946335.pdfIn PDF document text
    • https://sudodufutela.weebly.com/uploads/1/3/5/9/135960501/vulipaxixidig-rojirotijan-tebobojurazofad-fafipukivaw.pdfIn PDF document text
    • https://cdn.sqhk.co/tizuvuwo/7ifNThc/setereguxoxefig.pdfIn PDF document text
    • http://trydouche.xyz/nadiwatusaxet47ift.pdfIn PDF document text
    • http://loxebosobudi.66ghz.com/hornsey_park_surgery_cqc_report.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/jjijhE4/93492505765.pdfIn PDF document text
    • https://bajorenurelop.weebly.com/uploads/1/3/0/7/130739037/kugoburijut.pdfIn PDF document text
    • http://zagesevava.iblogger.org/superdry_t_shirt_size_guide.pdfIn PDF document text
    • https://temavemata.weebly.com/uploads/1/3/4/6/134611183/7782203.pdfIn PDF document text
    • http://doguzunagenuxo.22web.org/hotel_website_templates_free_psd.pdfIn PDF document text
    • https://tawedituja.weebly.com/uploads/1/3/4/8/134864040/zunokizuxafav.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/ghjiYhe/mirror_by_lululemon_how_much.pdfIn PDF document text
    • https://vonewujin.weebly.com/uploads/1/3/1/3/131380349/2525749.pdfIn PDF document text
    • https://cdn.sqhk.co/worekoxe/aib3zyT/narrator_s_voice_mod_apk_happymod.pdfIn PDF document text
    • http://regsenatvumen.website/hereditary_diseases_informationz8kjt.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/461e044d-89d1-4610-a0b4-3d01971cfe7c/milk_and_honey_book_review_new_york_times.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9671ad34-5e2f-43e4-a530-f8b2e39bcc24/30335642599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/539dba47-ed59-401f-9ff3-f572883944c9/stanley_battery_jump_starter_with_compressor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd7af0fd-b81f-4e91-a6d5-5f25861313b2/what_zodiac_sign_am_l.pdfIn PDF document text
    • http://sosodif.rf.gd/wutuvulelulifalepuxir.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE207 5324 bytes
SHA-256: 8440c2a399e4c29da76725199a956fe17d1e781181323f751e034631e0d3dae6
font_01_sfnt_off0000f43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43C 10348 bytes
SHA-256: e9ac8fd0a505015aecd78288aa73fa9b11296053058092b0da416aeb807608a3

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