Malicious PDF — malware analysis report

Static analysis result for SHA-256 47aa61600594d951…

MALICIOUS

PDF

69.6 KB Created: 2021-01-12 10:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c25e3fd8e6ffd2ed6e5ffc83718e22dc SHA-1: b53a0667130eb27bb956a6be5f00bcca87ef5d93 SHA-256: 47aa61600594d951e2028ae760de28f9c3bc5ee9af084b6ec917afac93364231
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to 'Jersey Mike's menu calories' and 'wkhtmltopdf', likely a lure to encourage clicks on the malicious links.

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 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://trafficel.ru/123?utm_term=jersey+mike%2527s+menu+calories PDF link annotation
    • https://site-1173456.mozfiles.com/files/1173456/emoji_puzzle_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403823/normal_5fe18b345b4d8.pdfIn PDF document text
    • https://site-1168031.mozfiles.com/files/1168031/checklist_app_for_business.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494648/normal_5fbebdc3d564b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421624/normal_5fbe9ab86f70d.pdfIn PDF document text
    • https://site-1166657.mozfiles.com/files/1166657/razoxanodemaviv.pdfIn PDF document text
    • https://site-1166597.mozfiles.com/files/1166597/6590350990.pdfIn PDF document text
    • https://ritenevibufu.weebly.com/uploads/1/3/4/6/134639535/a700e9585baf084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f8e068f16379.pdfIn PDF document text
    • https://site-1175908.mozfiles.com/files/1175908/microsoft_flight_simulator_military_aircraft.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/xovekolamoxe/38764462296.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/upsc_2016_answer_key_insights.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/birds_of_tokyo_unbreakable_sheet_music.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_off0000d3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AB 5132 bytes
SHA-256: a12ceab35ce5de8d74e1f4cb63544d7f5109ac1a439621c885a7246c5ec8a4c0
font_01_sfnt_off0000e51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51B 10884 bytes
SHA-256: 1930de505b585d5dc947601fe01dd5256c48c4a45225c73d04847691929a01a1

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