Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e580c52786ec4da…

MALICIOUS

PDF

64.8 KB Created: 2020-12-16 02:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9cd2ff4a7adf6209fe6b8aa19971d2b2 SHA-1: fa2cced6ec80c5d1c51c55ede31bbdc5e89f15c8 SHA-256: 1e580c52786ec4dad0fe5c13b4ce97dea39831544c856d75ed4c735011747b66
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a large number of embedded external links, many pointing to PDF files, suggesting a link farm or SEO spam operation. One of the embedded URIs, 'https://trafftec.ru/123?utm_term=reebok+answer+iv+red', is likely a malicious redirection or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=reebok+answer+iv+red PDF link annotation
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/jotibatoja.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/6848636.pdfIn PDF document text
    • https://kutemipemowu.weebly.com/uploads/1/3/4/8/134860595/tukamajuvesunoma.pdfIn PDF document text
    • https://gareketekefebon.weebly.com/uploads/1/3/4/6/134695024/kotuxen.pdfIn PDF document text
    • https://suxapenogabako.weebly.com/uploads/1/3/4/6/134602080/7884647.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/purufiz/define_advertisement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54a76525-1805-4976-a0fa-b84282f670d5/3d_ultra_pinball.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/78819217465.pdfIn PDF document text
    • https://s3.amazonaws.com/texifaxepag/89507038839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87738cab-7b9c-4938-95e0-6c66113318e7/80830221269.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/boarding_house_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/ejercicios_de_caida_libre_resueltos_faciles.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/big_farm_mobile_harvest_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/bowling_green_state_university_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf4735a7-a984-469f-9f00-af9e93dfa86a/menzil_ilahisi_indir.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF72 5152 bytes
SHA-256: a34871402bf6b73e8b4453630226bf46ed162edf19534c9b6dc2bc35be079c9b
font_01_sfnt_off0000d123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD123 10960 bytes
SHA-256: c4052796516ef69cc03337afbb893f44c7570f7d78fadc85b626560a761409f4

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