Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1d3efb28c8eea8…

MALICIOUS

PDF

73.8 KB Created: 2021-03-28 19:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f9aee82c63d2cdef3ed584af50b3d8af SHA-1: 4c890588611f7a1edfc0388a557c471241c28f24 SHA-256: 0b1d3efb28c8eea8c86a9a5b4fee3becb5d52b3fcfb7eeaf9cadf7761c1fe436
214 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, characteristic of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://maypoin.ru/strik?utm_term=homelite+3514c+price PDF link annotation
    • http://woxijakuzadajew.getenjoyment.net/71088764612.pdfIn PDF document text
    • https://sajadarazaga.weebly.com/uploads/1/3/4/3/134340855/kuwikazu-galijo-pitefanipijesov-tevoso.pdfIn PDF document text
    • https://vonenefanor.weebly.com/uploads/1/3/4/6/134638091/801766.pdfIn PDF document text
    • https://jowidizikut.weebly.com/uploads/1/3/0/8/130874332/9370926.pdfIn PDF document text
    • https://tuvaruwa.weebly.com/uploads/1/3/4/7/134711775/2382101.pdfIn PDF document text
    • https://buzufurabobozu.weebly.com/uploads/1/3/5/3/135304208/povijutovir_kopepavalog_wujudozava.pdfIn PDF document text
    • https://bupulaserora.weebly.com/uploads/1/3/1/4/131437689/140868.pdfIn PDF document text
    • http://nosixavol.sportsontheweb.net/guzapagegopu.pdfIn PDF document text
    • https://fipugodegiposal.weebly.com/uploads/1/3/4/6/134687615/watolakejusalu-sadofado-gubiga-voxevenezami.pdfIn PDF document text
    • https://xoxefalumigak.weebly.com/uploads/1/3/4/5/134527234/85c16a.pdfIn PDF document text
    • https://fufopijubotuxo.weebly.com/uploads/1/3/1/3/131381544/pajumipaj-rigakapaf.pdfIn PDF document text
    • https://revejoduxu.weebly.com/uploads/1/3/4/2/134266419/kuxolenikaritupeb.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/99373889582.pdfIn PDF document text
    • http://rogijowop.sportsontheweb.net/lagiwekidupolixuwa.pdfIn PDF document text
    • http://sirofopunisatus.iblogger.org/wipidogibotewekakukep.pdfIn PDF document text
    • https://lerizizevu.weebly.com/uploads/1/3/4/3/134314130/xubuvuribunure-xopobulasuguki-vogirasitute-sigivukomam.pdfIn PDF document text
    • https://nokajavu.weebly.com/uploads/1/3/0/9/130969653/6cb00f8b3a05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gadoriwufes.rf.gd/a_color_of_his_own_big_book.pdfIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_5d2dc4b3680c48f785c7562af5dcc3a7.pdf?index=trueIn PDF document text
    • http://sekovukubetib.epizy.com/wegoxororuzunuradunabigu.pdfIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_03e83078e4014be6b2cd7a4ca62cc234.pdf?index=trueIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_87e16924d3e343359e8cce95ab8db03f.pdf?index=trueIn PDF document text
    • http://xaguxebijop.epizy.com/aditya_hrudayam_in_telugu_with_meaning.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_df650304636b47c9be91b5c647185e06.pdf?index=trueIn PDF document text
    • http://rupufak.epizy.com/10957519472.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_off0000e48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48F 5080 bytes
SHA-256: 7997b4cbccb2d0fc6c5dbf2a8c3c940623edc134e18f0bd8896e25239d96ed49
font_01_sfnt_off0000f5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D7 10612 bytes
SHA-256: ad7f57a23027b9fa2f4468b7a0225ec65140f0ea2deb4d24b372625927edc81c

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