Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c990e448da85d3…

MALICIOUS

PDF

87.7 KB Created: 2021-03-25 10:09:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1c984b7d9b054ec0f17a3b4d583b0860 SHA-1: c1e14821868cb0e08a61c9229cd563a4bc0d5feb SHA-256: 20c990e448da85d3c1992c543500f4bce2f6b30abd18d25c628368024921606e
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, possibly to redirect users to phishing sites or download further malware. No scripts were extracted, but the overall structure and URL analysis point to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://baarspo.ru/wix?keyword=chapter+8+covalent+bonding+assessment+answers PDF link annotation
    • http://espacecmb.xyz/is_garrett_ace_250_waterproofg53c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367268/normal_5ffe7077d5394.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/how_to_use_dvr_on_dish3o6aw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375095/normal_600979b7977cc.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/gefumuvafosodirovebalasa.pdfIn PDF document text
    • http://coolstudent.space/express_entry_profile_creation_guidefah2g.pdfIn PDF document text
    • http://fofolep.mywebcommunity.org/15221380138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450260/normal_604673397d40b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417662/normal_602a57d4d359c.pdfIn PDF document text
    • http://soul-felt.com/229030523133gxvj.pdfIn PDF document text
    • http://makedctl.site/rakabuvorugiol046.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/how_to_eat_right_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409621/normal_60053b6fe9d14.pdfIn PDF document text
    • http://drilltech.info/need_for_speed_no_limits_gold_hack_ios6968w.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/4ad35f06-64bf-4981-bd9e-9b604d36e2a9/5821326311.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/21179252026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7de00a8-190d-42fa-94ad-399b6dc42009/55441915525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5787d453-6624-468a-9a16-26c5f5cf89ef/lasigonumisekitenigarox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71ec954-cfd5-42fe-a167-ae0eb13ab6c1/the_fork_the_witch_and_the_worm_volume_2.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/20575661203.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/basic_life_support_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/badlapur_movie_free_hd.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_off0001174b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174B 5876 bytes
SHA-256: 3f6c0a8db2f10a6c41ff7e869f9024cb516758368e1dacb71f7776c1d78180a2
font_01_sfnt_off00012b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2B 11240 bytes
SHA-256: 767ea3c05c8edfba3bcefb0e156eb1c1e14004925904972880a04413f035bc7d

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