Malicious PDF — malware analysis report

Static analysis result for SHA-256 105fecd0fd5c0bad…

MALICIOUS

PDF

74.7 KB Created: 2021-03-08 16:13:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f10287bc58da3b6a1f34681a5b73ce30 SHA-1: e83eaa03ec5322360ec67a8598872800652d9e3f SHA-256: 105fecd0fd5c0badba8a39b382bb55f8026444ecfe1baacb3d131509932db050
96 Risk Score

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. The presence of an embedded URI pointing to 'resalured.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely designed to trick users into visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=www+lowes+com%252Fsurvey
    • http://mowefopovog.mywebcommunity.org/does_paid_administrative_leave_mean_fired.pdf
    • http://vigastlens.xyz/7609657918m68sh.pdf
    • http://nncucuucuc.space/how_to_volunteer_firefighter_australiafjl6j.pdf
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5feb7cb6eaa18.pdf
    • https://static.s123-cdn-static.com/uploads/4445541/normal_5ff302107bc7a.pdf
    • https://cdn-cms.f-static.net/uploads/4383475/normal_6013768ac7c68.pdf
    • https://cdn-cms.f-static.net/uploads/4427284/normal_602347ce182aa.pdf
    • https://static.s123-cdn-static.com/uploads/4386606/normal_5ff431a6ca7cb.pdf
    • http://linavaluviriv.getenjoyment.net/60874444223.pdf
    • http://gagivukamuw.getenjoyment.net/doctor_zhivago_keira_knightley_online.pdf
    • http://vodabutopidaru.getenjoyment.net/90923197057.pdf
    • http://lazadacostumercenter.com/728287500552j1t3.pdf
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5ff57f20c4ac6.pdf
    • http://gagogepatajebe.medianewsonline.com/ferovuxolekibikexe.pdf
    • https://static.s123-cdn-static.com/uploads/4384459/normal_5fcc954d92a4b.pdf
    • http://neuroncraft.online/49705951007v3e3n.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://namakanexir.atwebpages.com/gaxokolobojabaza.pdf
    • http://davofunup.onlinewebshop.net/from_the_mixed_up_files_of_mrs_basil_e_frankweiler_quotes.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8bf.bin
1e4d44a078fde216597ce730a81e4fbddf0f878852d4e9a221a0282393a238db
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BF 5036 bytes
font_01_sfnt_off0000f9f3.bin
8d385c5fe77dbb0bb0474d4a8af4842e643fe96f2fdd9857489b8619a9cdef12
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F3 10596 bytes