Malicious PDF — malware analysis report

Static analysis result for SHA-256 127b4b4ec009d4d7…

MALICIOUS

PDF

97.6 KB Created: 2021-03-13 20:29:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6ea8b72f0cf60463288c467a386740b5 SHA-1: bc8e09e2b64d75f647efaece4801b2963edfcda4 SHA-256: 127b4b4ec009d4d7bbf2303127e5449a0a7ecabfc622f28ae4f118bfaaf410e9
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded links, many pointing to disposable domains, and uses a 'utm_term' parameter suggesting a phishing or spam campaign. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a search query, reinforcing the lure. No scripts were extracted, but the overall structure and URL distribution indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gimoguvi.ru/123?utm_term=surah+ar+rahman+pdf+full PDF link annotation
    • http://yazansoft.com/jijepufojitejv62y.pdfIn PDF document text
    • http://jonipifenukiz.mygamesonline.org/are_craftsman_wrenches_still_made_in_usa.pdfIn PDF document text
    • http://arenaprobet.com/echo_pb_250_leaf_blower_carburetorluppr.pdfIn PDF document text
    • http://rapoxarawiwalo.sportsontheweb.net/what_does_submissive_mean_in_the_bible.pdfIn PDF document text
    • http://bilet-pdd.site/30689890434jt7mx.pdfIn PDF document text
    • http://kelnoteres.xyz/50_1_fuel_mix_ratio_chartv685c.pdfIn PDF document text
    • http://jajobepa.iblogger.org/93310501796.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/70098793903.pdfIn PDF document text
    • http://ganedoxumizaj.sportsontheweb.net/tying_knots_book.pdfIn PDF document text
    • http://vudifabofugejij.medianewsonline.com/sizofawimeriwu.pdfIn PDF document text
    • http://tuwimig.scienceontheweb.net/95782556366.pdfIn PDF document text
    • http://mattelipsticks.site/anet_a8_frame_kitaz54a.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/50_shades_of_grey_soundtrack_album.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_13c5b72446f64ef5b4009066f5193330.pdf?index=trueIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_7478f8a0b9ca49ca9939a9af4853c3e5.pdf?index=trueIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_04a4f9084c4347cab9161d95468b6c2a.pdf?index=trueIn PDF document text
    • http://lanuvurunipa.epizy.com/accounting_for_dummies_audiobook_free.pdfIn PDF document text
    • http://jilasig.epizy.com/7_principles_of_universal_design_examples.pdfIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_42b3d04178654dfeae90b931fb404892.pdf?index=trueIn PDF document text
    • http://kopolug.myartsonline.com/how_to_become_your_dogs_best_friend.pdfIn PDF document text
    • http://gizixaxeviduf.myartsonline.com/algebraic_expression_exercises.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/races_warcraft_2.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013b9e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13B9E 32944 bytes
SHA-256: e9daacf1d34403ddb7525dd776a0c47e537c31c5f5f4a2b50bf170774ac4401c
font_00_sfnt_off00010628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10628 5208 bytes
SHA-256: a8b0bef1dbd13276df842cebf486b262c47fbcbfeb9d1563bcfb76d8dfceaad1
font_01_sfnt_off000117b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B5 10748 bytes
SHA-256: bb10c59ec5cba4ad00906cef91c5af430579ef2c0e025ba8599358437a5cc12f

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