Malicious PDF — malware analysis report

Static analysis result for SHA-256 11684955b1c39fda…

MALICIOUS

PDF

70.8 KB Created: 2021-03-28 13:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aa3c137b0ceb22112b50207047df8e17 SHA-1: 6690142d6ba3fa5766012445c9f428e3084562dc SHA-256: 11684955b1c39fda4c9c89c300fd41d7e6a5144cae93ab0884f488c6ec36b990
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution scheme. The presence of a 'download' button heuristic further supports this, indicating a lure to trick users into clicking malicious links.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/123?utm_term=sql+server+express+2012+sp4 PDF link annotation
    • http://tacfitproducts.com/badrinath_ki_dulhania_song_video_3gpgq3zx.pdfIn PDF document text
    • https://sozazoje.weebly.com/uploads/1/3/1/1/131164180/965451.pdfIn PDF document text
    • http://compte-cmbretagne.best/zombie_diary_3_apk72jpg.pdfIn PDF document text
    • http://copyrightproblem.com/fogezokupakegikajav7nird.pdfIn PDF document text
    • https://wanowozuvigamo.weebly.com/uploads/1/3/0/7/130738859/56d48e0d0c.pdfIn PDF document text
    • http://sacredname.ru/375200528445mmo.pdfIn PDF document text
    • http://bobatorosas.mypressonline.com/79837768065.pdfIn PDF document text
    • https://joxukitemubat.weebly.com/uploads/1/3/5/9/135957717/ae19a15bb05af.pdfIn PDF document text
    • http://5coupon.info/how_to_fix_no_operating_system_found_windows_7m8bsb.pdfIn PDF document text
    • http://waverufusufafuv.scienceontheweb.net/refraction_of_light_class_11_target.pdfIn PDF document text
    • https://fuxexuwamonem.weebly.com/uploads/1/3/5/3/135387882/bakeletot_midese.pdfIn PDF document text
    • https://gorimulokubev.weebly.com/uploads/1/3/1/4/131438265/9ae25b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/exercice_d_orthographe_cm2.pdfIn PDF document text
    • http://jagomizaf.atwebpages.com/bwv_999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cef939e3-69dc-4354-9a5a-e73eb936223c/how_to_buy_and_sell_bitcoin_without_fees.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc1b2117-50db-4674-96fa-c064280a1ca2/gudox.pdfIn PDF document text
    • http://semowomeso.onlinewebshop.net/16205178183.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/bonupimefejitigirexogigat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f62f6d-2594-4c34-b680-1fbd5a4ba562/13558317732.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD454 5372 bytes
SHA-256: c47b23b0da1b19c73ef8518ec764f2d507c51323fd5eaecf0f99f943ee71c2d6
font_01_sfnt_off0000e6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C9 11128 bytes
SHA-256: 5dec3a6fbb5f0f5048623c2a3af0464f402a2e5aa9d0d603288c5f189d47804a

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