Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b45d7fa5e2ffae…

MALICIOUS

PDF

85.8 KB Created: 2021-03-25 11:56:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 71d76fe4f0893173e90be0913e980743 SHA-1: 43e39111eb143536a8040b36a51a22356b2e8e5a SHA-256: 64b45d7fa5e2ffaebbf8e6141b6424c511563dc98dae6bc70308cb98e10790f9
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/strik?utm_term=did+you+hear+about+pre+algebra+with+pizzazz+page+204 PDF link annotation
    • https://bibawegosisuzu.weebly.com/uploads/1/3/5/9/135961680/7250186.pdfIn PDF document text
    • https://wagezulixi.weebly.com/uploads/1/3/2/6/132695300/dejelut.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/k2fmtjh/wood_shop_bbq_delivery.pdfIn PDF document text
    • https://fasanubuxa.weebly.com/uploads/1/3/4/7/134733786/zatudefa-fasutuzuvov.pdfIn PDF document text
    • https://rejowuboxobe.weebly.com/uploads/1/3/2/6/132680789/zelutafuvozewijezebe.pdfIn PDF document text
    • https://cdn.sqhk.co/segidexu/ngejggi/fuforutivotijikigatisodol.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/PhfggWI/80746654800.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/tiseponit.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/xafajefakuger.pdfIn PDF document text
    • https://xumexutibivuw.weebly.com/uploads/1/3/2/6/132680998/4877595.pdfIn PDF document text
    • https://dimavuvinidet.weebly.com/uploads/1/3/1/3/131397938/paveredakakire.pdfIn PDF document text
    • https://gubukaxonular.weebly.com/uploads/1/3/5/3/135349028/5c6a5eb7ee4.pdfIn PDF document text
    • https://kunefenirubineb.weebly.com/uploads/1/3/0/7/130739500/lalilepode.pdfIn PDF document text
    • https://fegovelusilefu.weebly.com/uploads/1/3/5/3/135330230/a1f8ef79103.pdfIn PDF document text
    • https://cdn.sqhk.co/nimuxugemu/qejgajd/truck_racing_pc_game_download.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/mekonulegipero/kubepigevoxuwoxoxemikes.pdfIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_e4f87092c01441a781d3928cd6087d11.pdf?index=trueIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_bee964f0773f4f9897b5cd55fcf8c466.pdf?index=trueIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_2eabcafa543941748c5d0a0901c8e29e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kujapomib/mugupi.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/how_do_you_reset_the_icemaker_on_a_whirlpool_refrigerator.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/90114372685.pdfIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_cfbf95e7cfcb48b897dc8a583a66f875.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_off00011319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11319 5788 bytes
SHA-256: 53b3dffc4427cb8ac3970a1ce48f21a17d7f84765de7bb039c29ceb72bb5c859
font_01_sfnt_off000126ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EE 9968 bytes
SHA-256: 18aabddf68376e123187d8ce814b33af2459a15b27f30826872a448a1241ea75