Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a6744dc1f9684b0…

MALICIOUS

PDF

92.4 KB Created: 2021-03-19 06:13:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e2bec26a14ea9550fff24289557d9270 SHA-1: 7a6719755252a2434bf23f559c83b77d2d79280d SHA-256: 8a6744dc1f9684b05931a695fcef136c9f1bb5663864f5de38df97893ac40f9b
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 large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The primary URL, 'https://fokemale.ru/strik?utm_term=lg+washing+machine+13kg+top+loader+manual', is presented as a manual but likely leads to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/strik?utm_term=lg+washing+machine+13kg+top+loader+manual PDF link annotation
    • https://cdn.sqhk.co/mojobugoge/gejg6LP/81636719388.pdfIn PDF document text
    • http://rowomonug.mywebcommunity.org/ligazivapuboded.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/ciaeINr/bizimixapakofagezureru.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/jaid2jb/6383601056.pdfIn PDF document text
    • https://cdn.sqhk.co/bifoligi/hdPjaib/two_player_games_free_to_play.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
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_b3ed98dc5a0040cc963762738b6612f8.pdf?index=trueIn PDF document text
    • http://wexadelovatapox.rf.gd/black_desert_class_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8bbbb0-9c95-4830-afaa-c331de8e672c/fagulagakili.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/26867603056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/064c424e-6def-4982-87fd-82181e943952/zenamujafujejesopodu.pdfIn PDF document text
    • http://rosudera.epizy.com/54908315985.pdfIn PDF document text
    • https://d650f791-4ca6-4964-96f1-ba9fac0414c1.filesusr.com/ugd/adf9cb_b27bc72c70cf46dca48f121009c83d61.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c11a0b13-117a-4870-b2b9-b5b9a0a94c1b/ruvakowuweb.pdfIn PDF document text
    • http://japotegalavig.epizy.com/70796276596.pdfIn PDF document text
    • http://jowosos.myartsonline.com/kozadav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ce5bf8a-e576-4a93-9dc4-26dc03619cd7/92473461489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/260c85ed-f594-4846-998c-5e314ed054c4/chocolate_and_tan_dapple_dachshund.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d0204d8-2e17-456d-9d36-970e15599262/likexodebato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6d8849-b09d-48de-96ba-ddbf603e85e8/vajigawajidivizuvuxexesot.pdfIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_898287757b664a0abd533867d6353945.pdf?index=trueIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_c7e496cdb5ef4703a1cf84274cef043a.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10803 5680 bytes
SHA-256: 49d50f3ea1ae90d66d23680be65fe2e5c2af03889e710b91bdd9bad708153357
font_01_sfnt_off00011b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B39 10840 bytes
SHA-256: fec82b4c1a035dbf841ffa8232519b69f920cd8a2b1f91bb7a690b8842a317f0
font_02_sfnt_off0001403b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1403B 16148 bytes
SHA-256: 36f0f7c847a3d257bca3513ae5362ff552e89fccc363f2ec096b83b555007b24
font_03_sfnt_off0001554a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1554A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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