Malicious PDF — malware analysis report

Static analysis result for SHA-256 3046bf42d19a66f1…

MALICIOUS

PDF

82.0 KB Created: 2021-04-11 01:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f308d5dcdc59f934356dd6f18783c167 SHA-1: 236c6945e64db110f8d9c23b5d54c1843cf1b69d SHA-256: 3046bf42d19a66f126bbdc58446e1bec27c51fb866a83ebf0a821e8cad0f847f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('resalured.ru') and containing a product name as a UTM parameter, suggesting a phishing or scam lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links to disposable hosting, further supporting a malicious intent. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the structure and URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/strik?utm_term=black+and+decker+dustbuster+14.4+v PDF link annotation
    • http://physcoo.com/43149848457pi66k.pdfIn PDF document text
    • http://devgm.design/highway_racing_car6defr.pdfIn PDF document text
    • http://indonesia2health.online/5586278943y2lnx.pdfIn PDF document text
    • http://kompledom.com/neil_degrasse_tyson_cosmos_capitulo_15jkzn.pdfIn PDF document text
    • https://jasadugo.weebly.com/uploads/1/3/5/3/135341750/37f3c68.pdfIn PDF document text
    • http://healthyforczechrepublic.site/52604022434xqygt.pdfIn PDF document text
    • http://viruxego.mygamesonline.org/spivak_solutions_calculus_manifolds.pdfIn PDF document text
    • http://jusolul.22web.org/23608680873.pdfIn PDF document text
    • http://raisinshub.pro/vazebonodozixepu1lty1.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/gexja2C/call_of_duty_cold_war_pre_order_ps5.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/EVgiieG/xugiladotafisojemupefif.pdfIn PDF document text
    • http://gupirigugorixuf.sportsontheweb.net/pibiko.pdfIn PDF document text
    • http://com-signto6.xyz/pevoxonufajoxenxwi2.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/26321005806.pdfIn PDF document text
    • https://zitujizu.weebly.com/uploads/1/3/4/7/134731650/bazinedi.pdfIn PDF document text
    • http://arenda-comp.space/vedogoseq1ygh.pdfIn PDF document text
    • http://werenntaq.online/how_to_install_hp_officejet_6500_wirelessc8n58.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xujekodade.epizy.com/winexu.pdfIn PDF document text
    • http://tiwobera.rf.gd/pomikavafewalijomegifo.pdfIn PDF document text
    • http://bovifuxabobi.epizy.com/vexesavogatixefap.pdfIn PDF document text
    • http://safefimij.epizy.com/2927879810.pdfIn PDF document text
    • http://tifavamifikas.myartsonline.com/92859119834.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_off000103bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BB 5420 bytes
SHA-256: c85a1ba6471c210dd43b6984e21d8aa6e78cbe52eb3865dec4828bbd4134f100
font_01_sfnt_off00011649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11649 10532 bytes
SHA-256: 1855b1aff8bf5bff7746d8e5a6556efa336223e74bfcc049143e0bc93a25d73d

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