Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f2ced47dd374de…

MALICIOUS

PDF

74.4 KB Created: 2021-06-10 14:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6e4f48fc84e757bc524e953669204abe SHA-1: dc57d9f8ee72f3e31c1dc92e64e30be6a20f7883 SHA-256: f5f2ced47dd374de152365a083283f706e49eab60b97e094e6918ab948f9ba69
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link farm designed to direct users to external websites, masquerading as a game modification download. Heuristics indicate a high likelihood of malicious intent, with ClamAV specifically identifying it as Pdf.Phishing.Trojan. The presence of numerous external links, many hosted on disposable domains, strongly suggests a phishing or malware distribution campaign. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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 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://huntic.ru/pbw?utm_term=zombie+frontier+3+mod+apk PDF link annotation
    • https://gavebinakufir.weebly.com/uploads/1/3/2/3/132302735/jojorotavejeto.pdfIn PDF document text
    • https://nuzewotamomumaf.weebly.com/uploads/1/3/4/7/134701518/8337336.pdfIn PDF document text
    • https://digaporabanezaf.weebly.com/uploads/1/3/4/6/134689005/cbad84de6d.pdfIn PDF document text
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/radomagim_numewikenij_pojujovolobede_lirav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421477/normal_5fdd19b9e67ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443337/normal_5fd684f2c32a8.pdfIn PDF document text
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/3256708.pdfIn PDF document text
    • https://vilogewipi.weebly.com/uploads/1/3/5/3/135308723/a78d7b3.pdfIn PDF document text
    • https://mukozuzaze.weebly.com/uploads/1/3/4/2/134265885/murexevafub.pdfIn PDF document text
    • https://vejanozamafiz.weebly.com/uploads/1/3/5/3/135351199/gaxagojulewow.pdfIn PDF document text
    • https://vexepagofebove.weebly.com/uploads/1/3/4/8/134866030/36a9695.pdfIn PDF document text
    • https://rikedinodewo.weebly.com/uploads/1/3/5/3/135323941/7379fa826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_602ce9d0abea4.pdfIn PDF document text
    • https://gebifulud.weebly.com/uploads/1/3/0/7/130775692/2773987.pdfIn PDF document text
    • https://pisolapep.weebly.com/uploads/1/3/4/6/134648883/61697cda600af5.pdfIn PDF document text
    • https://jimekomu.weebly.com/uploads/1/3/1/4/131453536/e940514e8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_60bd76066ec35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420014/normal_60baa71a31509.pdfIn PDF document text
    • https://gorokawuse.weebly.com/uploads/1/3/4/4/134489158/1095831.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fibonilavi.pbworks.com/f/child_biopsychosocial_assessment_template_doc.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/w/file/fetch/144586773/student_exploration_calorimetry_lab_gizmo_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b064568-44a1-4b12-824a-7e3b6748a5d8/82816593919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08d6353e-997a-4b83-8020-869244574e17/78366770746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5ec722-725a-43b9-911c-df3f6ae21361/49906984151.pdfIn PDF document text
    • http://vajaxasave.pbworks.com/w/file/fetch/144462111/dozufemebumu.pdfIn PDF document text
    • http://jazonewu.pbworks.com/w/file/fetch/144734817/resijud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a420006d-3b11-43cf-a666-c78ea08168a1/tudivorodixifolemonun.pdfIn PDF document text
    • http://nafidob.pbworks.com/w/file/fetch/144613914/how_do_i_install_gta_5_100_save.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_off0000e668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE668 5300 bytes
SHA-256: 78790725f1dacb5d4f466780513020021dd2b1608aa11d3b66a3af8dffda0f24
font_01_sfnt_off0000f860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF860 10356 bytes
SHA-256: c3641822f119453a583702f3868fa0bd498b7e51e4ca1cbb8f54badf17defc9f

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