Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca12f49f5c4059c…

MALICIOUS

PDF

74.3 KB Created: 2021-06-10 03:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3d5bca1ac7e84dfda5b41233cbbdb2cd SHA-1: 0f58d98e3138d1bad59931a3145807b37b136447 SHA-256: cca12f49f5c4059c05d12c5f0b19b59a587b3855060f571bac87aef7e5b234b6
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, and is detected by ClamAV as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains text related to downloading APKs, indicating a lure for potentially malicious mobile applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://allytemp.ru/pbw?utm_term=movie+hd+apk+download+for+iphone PDF link annotation
    • https://rixifumalig.weebly.com/uploads/1/3/1/4/131437092/c208c45492c71e9.pdfIn PDF document text
    • https://rediwikutine.weebly.com/uploads/1/3/4/0/134096605/36046fb6.pdfIn PDF document text
    • https://vorebalulu.weebly.com/uploads/1/3/5/9/135962534/4fdac5c362b.pdfIn PDF document text
    • https://rozinezo.weebly.com/uploads/1/3/1/6/131636990/sebitos_kezuzuvetexako.pdfIn PDF document text
    • https://menekagamop.weebly.com/uploads/1/3/4/0/134097565/1975147.pdfIn PDF document text
    • https://mejidoxele.weebly.com/uploads/1/3/4/3/134320803/peruzexe_ragajozujubozi_kesumamovo_milewu.pdfIn PDF document text
    • https://siketaxugulus.weebly.com/uploads/1/3/5/3/135309361/ripip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxamom.pbworks.com/w/file/fetch/144557703/ps_touch_apk_download_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adae3674-7560-4ebb-a124-f71d9e8ed086/36633100423.pdfIn PDF document text
    • http://lokifasowaso.pbworks.com/w/file/fetch/144649908/alienigenas_do_passado_todas_as_temporadas_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dcaa814-4f12-4267-97a3-771dcc0c72ba/65672892007.pdfIn PDF document text
    • http://fipivuzigoge.pbworks.com/w/file/fetch/144422028/tabujen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eef4fab5-37ed-4fb4-b879-9364dfecaf86/makumamazisasojifov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f3aedac-00f2-4de7-a199-90c3a8b36a24/40791305088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62aaa34c-09cd-4983-839f-78d6b691e118/what_is_the_summary_of_cinderella.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/w/file/fetch/144814875/buwapapajagokezo.pdfIn PDF document text
    • http://sozakuvepar.pbworks.com/w/file/fetch/144487056/what_are_the_characteristics_of_teacher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a844e884-ef3e-4c84-a169-200db44d2fe7/sony_nxcam_manual_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/677ea9bf-f50b-4a12-a4b3-6e2be339b4d2/nanapamolinajej.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_off0000e55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55C 5172 bytes
SHA-256: 8938c627e232338c1868f7169520de75ff69463550489adbc0e48914dc95ac47
font_01_sfnt_off0000f713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF713 10836 bytes
SHA-256: 06a9a86b41e29eac95f6f935896617c52748ab9847da666a9a0574a6ad662b77