Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f4d9000744bc75…

MALICIOUS

PDF

75.5 KB Created: 2021-01-12 03:42:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 08a47cb9254abc572ed15120aed6f2b7 SHA-1: d1f9751413bbfa7f3852244353f41e3becd1a470 SHA-256: d5f4d9000744bc751b3f1beea6b62746be86fef243cb3a51d1aa95a3044b31f8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, characteristic of a link farm designed to attract traffic. One of the primary URLs, 'https://traffking.ru/123?utm_term=free+download+poser+9+full+version', suggests a lure for free software downloads. The presence of a PDF_SEO_LINK_FARM heuristic firing and the ML_NYX_PDF_MALICIOUS score of 0.999681 strongly indicate malicious intent, likely to redirect users to malicious sites or download further malware. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://traffking.ru/123?utm_term=free+download+poser+9+full+version PDF link annotation
    • https://cdn.sqhk.co/jamolipa/hhhemij/primeval_movie_online_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409256/normal_5fdd6d6514ac0.pdfIn PDF document text
    • https://xoxoxiwozolem.weebly.com/uploads/1/3/0/7/130739626/gazogusurem-gujolatunugades-sogawugemi.pdfIn PDF document text
    • https://site-1228067.mozfiles.com/files/1228067/kung_fu_basics_for_beginners.pdfIn PDF document text
    • https://sutofuwanunow.weebly.com/uploads/1/3/0/8/130874369/majezirenomi_fodureziv_kobasosesigim_wagon.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://s3.amazonaws.com/xoguwavosuje/96529801360.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/carry_on_maratha_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/dc_comics_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/mamuvuwonetub.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/zeguwosek.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/6416337211.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_off0000ddd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD3 5100 bytes
SHA-256: 11cffb0407203be6f0fc8829628a16faef1dbc2acf0923a3ee758c1503eda0f3
font_01_sfnt_off0000ef45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 10392 bytes
SHA-256: 43fe608221cee22354b0bde374b52eb825a13f99983db3483815ed69b3363e9b
font_02_sfnt_off000112e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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