Malicious PDF — malware analysis report

Static analysis result for SHA-256 4825fb30367260c4…

MALICIOUS

PDF

78.9 KB Created: 2021-05-10 19:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1e3993a0aa3451159ea3fc2983546abd SHA-1: b88174b85988c91c4a5f29dfd27482062adcad71 SHA-256: 4825fb30367260c4efc926fc44a956c6a84ea7284f7ed6c80511addda27d856e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 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://ponafet.ru/strik?utm_term=sunding+bike+computer+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417419/normal_5fe9d72c562d9.pdfIn PDF document text
    • https://cdn.sqhk.co/livujiguf/ggeVZxt/zabavokodufepudizujarume.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/2gxppZb/38031818740.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CBzRJjj/4831920716.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/a_midsummer_nights_dream_character_analysisf70jd.pdfIn PDF document text
    • https://cdn.sqhk.co/rakapuvad/Zijjchi/improve_archery_kingdom_come_deliverance.pdfIn PDF document text
    • http://soldonlakewood.com/regaledejimigapjscua.pdfIn PDF document text
    • http://bomudomi.iblogger.org/brain_teaser_questions_with_answers.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/this_momentary_marriage_study_guideb7hrc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_605af63aa5d64.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/c8tZ7Rc/hachi_movie_japanese.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/gieI8gg/60835626981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415322/normal_5fda0e042484e.pdfIn PDF document text
    • https://cdn.sqhk.co/wejupexuput/9jejcja/sobapasafunowinufokademi.pdfIn PDF document text
    • https://cdn.sqhk.co/pelemobi/XjeifaR/wibolo.pdfIn PDF document text
    • http://sayseedokg.com/668439674489w1w6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426410/normal_600200e4e6843.pdfIn PDF document text
    • https://cdn.sqhk.co/govovazeket/gjb6xia/icici_mobile_recharge_coupon_code.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedifi/hKZhehi/7040470199.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lelisavebak.rf.gd/printable_barbados_passport_forms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b5e3182-8fd0-4ac6-8854-7701828630f7/gutopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d9de6a-ae2e-4f8a-925f-5af145817acd/arduino_language_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b0e615-4f8f-41ff-92e3-0028c0bfa34b/gtx_970_windforce_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f7f4ce-6be9-49a0-8e84-c982e6069f13/44004837072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/757f9294-2bfd-4619-87e5-8dcda6aee246/winds_of_winter_will_never_be_released_reddit.pdfIn PDF document text
    • http://zunebitalubale.rf.gd/5905663668.pdfIn PDF document text
    • http://kopupukev.rf.gd/30865056417.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_off0000f610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF610 5432 bytes
SHA-256: e4dac62334e53e405febd76bb6f856bc8e89db63f9e7dfb3d03b1928cb4268a8
font_01_sfnt_off0001088c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088C 10980 bytes
SHA-256: 1aafb0edce8a9d080ca80d15a1775684d6593e533bcbec8f37277277dcb6d0b2

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