Malicious PDF — malware analysis report

Static analysis result for SHA-256 998d5b244747bb60…

MALICIOUS

PDF

72.7 KB Created: 2020-12-27 07:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3ebd4e5d8116337fa59943f00533a795 SHA-1: ac679b397899c83e3d1a7f0eac051eb3d1e353bb SHA-256: 998d5b244747bb602f20a68fce690c943e65323385d9d2d59bc880229a75004f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The PDF contains an embedded URI pointing to 'traffine.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/aws?utm_term=addition+within+20+coloring+sheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403407/normal_5fc90787c4a3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_5f9525c7dc744.pdfIn PDF document text
    • https://bolojowugupi.weebly.com/uploads/1/3/4/8/134886087/nakuzivasumisitulibi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a6d4c61-feff-419d-bd2c-d265781a0614/gartner_ecm_magic_quadrant_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2e404b2-8eeb-4c98-8081-91532ccda0d1/kizinek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2ff016f-a116-4490-a9fb-057057cef6a8/15007216574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225596db-07ab-4b40-b61d-913ac18355f7/kasiwufevewuligosememolis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f76bc0f-7e9a-48e6-9ca3-2cc91b7afd2a/44576777125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08fa6910-fe4d-4def-9fe2-688b2f64c5b5/que_es_la_problematizacion_en_matematicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abdc7a26-5b76-489b-8556-f96b42c3d985/manhattan_prep_gre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/032e881d-3484-400f-b58a-99072e38c85c/lijakipebujerab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/483ab847-055c-4da1-95ff-322e3299b057/bellatrix_lestrange_wand_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b828149a-891f-4d7f-9836-17ce45c283f8/keziwavowajanuvakuvop.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_off0000de36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE36 5348 bytes
SHA-256: 5ca10bd6e80cd8e4a6d7817aab6242cb7a91f73c8e9ffa8b236f8acf37c1d5a5
font_01_sfnt_off0000f07a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07A 11020 bytes
SHA-256: 40c917b3a5b178eb176e6760eb118c3aa1804503b8ce69e56fb683e1e798c386

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