Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d0a63ade8e4918…

MALICIOUS

PDF

80.7 KB Created: 2021-03-19 19:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 42687fbcc9c180de86cb6a1425ef82e3 SHA-1: e48a38df28c7880236e5924f44422c2df463c615 SHA-256: 03d0a63ade8e49188083781e2a60e8649e3e2ab83fac88b96cdc72c146048ee7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links to disposable domains, a common tactic for SEO spam and phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and link farm heuristics suggest it's designed to redirect users to malicious content, potentially exploiting vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://nipisod.ru/wix?keyword=necromancer+gw2+leveling+guide PDF link annotation
    • http://nepoxiduvilej.scienceontheweb.net/endocrine_society_guidelines_acromegaly.pdfIn PDF document text
    • http://complerbnp.com/how_to_apache_netbeans_11._12daoj.pdfIn PDF document text
    • http://bazegal.iblogger.org/94764459282.pdfIn PDF document text
    • http://fitdieta.com/navate0eyh6.pdfIn PDF document text
    • http://gelupulofevabek.medianewsonline.com/52285343305.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/jazotivutidewufovikitfbtgo.pdfIn PDF document text
    • http://welifenepural.iblogger.org/69112794023.pdfIn PDF document text
    • http://wujejejifi.mygamesonline.org/pass4sure_ccna_200_125_free_download.pdfIn PDF document text
    • http://jilet2.club/ptcb_exam_study_guide_bookcs3bh.pdfIn PDF document text
    • http://myfirstsite.xyz/msi_geforce_gtx_970_4gb_specsrtzrd.pdfIn PDF document text
    • http://ragofilud.medianewsonline.com/21052113642.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://runogonu.epizy.com/54136080669.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/laminate_sheets_menards.pdfIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_b4fc4fa831b041a2822fa196f8be449a.pdf?index=trueIn PDF document text
    • https://7c5e2310-e79b-429e-9f4a-70471a43dcce.filesusr.com/ugd/8ec1ef_15ee812e83a842e38cf6436742a2c31c.pdf?index=trueIn PDF document text
    • https://4328a374-8b5c-4134-9cef-e132ca5fc89d.filesusr.com/ugd/6732b1_074785546686436d844aa1b07ac5b27b.pdf?index=trueIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_b6b6d7abd7e049e0b26d141ba800e627.pdf?index=trueIn PDF document text
    • https://564fd4a8-0e6d-4f97-813a-a14a70c45316.filesusr.com/ugd/f90d28_38bcf3b5e9b54f71b36ca4abc9e5574f.pdf?index=trueIn PDF document text
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_38835e1c6a134009bad490a2b5b75d57.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/yasin_suresi_trke_okunuu_indir.pdfIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_e262e63cd1a54a04b33f4bd5ce37b074.pdf?index=trueIn PDF document text
    • http://xirasajizobopa.rf.gd/vujuvilesizekukonitekut.pdfIn PDF document text
    • https://f72e0e13-a873-49c5-9cb5-3c2848b8c5b2.filesusr.com/ugd/f8ba4b_243257184a7a46ed8e74fb25ab39531a.pdf?index=trueIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_516e9c55782e460a9e54a5d359ed0a7d.pdf?index=trueIn PDF document text
    • http://xewaditina.epizy.com/soprador_husqvarna_350bt_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/casino_games_free_slots.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/26160023117.pdfIn PDF document text
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_3a6c0b3bcb4049eb80e7134b36123937.pdf?index=trueIn 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_off0000fbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBD 5336 bytes
SHA-256: 9cfb17fd3e59ef6323361a09573a8d31bc7ad145425e6f199008941a3b8e3846
font_01_sfnt_off00010de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE2 11180 bytes
SHA-256: 82457fcb61e9002c1bf23598b7bb64befecef49e8939d1040ee7626e6e824b3a

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