Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5bf0be1d069f41f…

MALICIOUS

PDF

74.8 KB Created: 2021-02-21 17:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4c249624859b47cad05598011b851b07 SHA-1: 155d77a061c8c51ab8bc4cbd357b6eb4f323996d SHA-256: f5bf0be1d069f41f29d027359fb5fa6084696b2cf18a688df124b051e5f6f152
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://bologen.ru/123?utm_term=why+use+a+shotgun+microphone PDF link annotation
    • https://cdn.sqhk.co/goluxewimabu/djeu4gg/do_not_touch_sign_in_spanish.pdfIn PDF document text
    • http://fikodon.iblogger.org/semibopidogimoru.pdfIn PDF document text
    • https://cdn.sqhk.co/popaxutu/mPlviau/gubawibul.pdfIn PDF document text
    • https://gareketekefebon.weebly.com/uploads/1/3/4/6/134695024/863720fa6713ba4.pdfIn PDF document text
    • https://cdn.sqhk.co/boguzivipel/s4jn9jg/gonin.pdfIn PDF document text
    • http://zupubovogigu.iblogger.org/fullscreen_activity_android_kotlin.pdfIn PDF document text
    • https://cdn.sqhk.co/xumifutave/f3DKheT/zombie_infection_mode_pubg.pdfIn PDF document text
    • https://wagemerefav.weebly.com/uploads/1/3/2/7/132712282/jelijide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/87022958412.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/nodusukonux.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/powerblock_sport_50_dumbbell_review.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/asphyxia_co_shu_nie_piano_sheet_music.pdfIn PDF document text
    • http://guvoperar.epizy.com/48915722167.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/83401611899.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/sixeruvezefekimipise.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/google_docs_google_spreadsheets.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_off0000e82c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82C 5428 bytes
SHA-256: 5c5a288beae7d7e19b1eab5ee67813ea02883acc9e43d6ab318e8ffe5a1214c8
font_01_sfnt_off0000fa93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA93 10544 bytes
SHA-256: 174c082d167a2ab771e2bc2a11a029fbb020aad1440897a3e5dba49597dc8e39

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