Malicious PDF — malware analysis report

Static analysis result for SHA-256 1782a7fcaba91423…

MALICIOUS

PDF

77.7 KB Created: 2021-04-23 04:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1a444741d78a072b9d89f2599fca6ead SHA-1: 3d585721c0813670f881a94e02f26dbc6caa9034 SHA-256: 1782a7fcaba91423700d613118a3dc0e158bdc7fb8130a304d3e3fe41f4d6cad
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm. The primary URL, 'https://lozipotod.ru/strik?utm_term=how+to+calculate+years+in+excel+between+two+dates', is presented as a search result, likely to trick users into visiting a malicious site. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=how+to+calculate+years+in+excel+between+two+dates PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386354/normal_6056ab1f12919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416796/normal_605c8765c1502.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382186/normal_5fc861075cfd8.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/weight_loss_diet_menu.pdfIn PDF document text
    • http://ragananutirud.iblogger.org/calorimeter_principle.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/fovaxonivos.pdfIn PDF document text
    • http://kugaraginoja.mypressonline.com/vugawezejosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393898/normal_6068f44f44be5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kumagubugudaxu.rf.gd/27114105980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72f0261e-a4cd-4b05-ab78-cb50ac39391d/90455745342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4774018-e2a0-47e8-b303-21168af65ccc/how_to_become_a_certified_yoga_instructor_in_california.pdfIn PDF document text
    • http://gumizaxewa.atwebpages.com/chris_watts_autopsy_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/american_academy_of_dermatology_guidelines_atopic_dermatitis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a2598df-ef18-4faf-9dea-95810ce6a1e4/94199860614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b383c466-25c0-4f80-a017-9bb45b799365/how_old_is_my_fisher_wood_stove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/186e41a4-1301-4a25-9502-4867b54c3a0c/hp_laserjet_pro_400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a70411d-cb4f-4b99-bb4a-cf4c7844acce/bitomumajefej.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/xuxewaketunaxabobize.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/netacad_linux_chapter_9_exam_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A5 5176 bytes
SHA-256: 0301ff7769e6cd23e8bdd0ca6be510c574dd5db4b237a12af2ace8b3068d7562
font_01_sfnt_off0000f555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF555 11148 bytes
SHA-256: 751e6b2118b9cd2b9716457442bc360433464c97847da014d582afaf609df0ab
font_02_sfnt_off00011b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.