Malicious PDF — malware analysis report

Static analysis result for SHA-256 724765834690286a…

MALICIOUS

PDF

65.5 KB Created: 2020-12-17 06:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7a91ce435267ce91f14381fd9a1fa66b SHA-1: d9e31239f275e4fe39d340c7fea79c8ae437ec74 SHA-256: 724765834690286a12d7628f0ac55435699db155f4beae9ace8316c27f117a86
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. ClamAV also detected it as a phishing trojan. The embedded URL is the primary indicator of compromise, likely leading to a phishing page designed to steal user credentials.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffe.ru/123?utm_term=lo+mucho+que+te+quiero+el+original+de+la+sierra PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450501/normal_5fa0e9e96a6d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426688/normal_5f9f73c9652c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f8e2fd5b3390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444353/normal_5fc189ea06141.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5aea4c6d964583642b5cb/t/5fcddf847ae85b53b2b44895/1607327620586/accident_formula_2_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/effab150-5bfd-48d6-b730-d3a18e700ed6/muliri.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a18fea4a794d564a4325/t/5fc53bdc3f75b166437e4683/1606761437804/sea_scouts_uniform_nz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/683e05eb-111f-4b38-b79a-e6991eaa76a5/dirategutadozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e3cc25-6925-4e49-b053-f484bb0446ea/chick_fil_a_trivia_questions_and_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f8f692c50b1a1e77efcd/t/5fc2d157fa04221c717d055d/1606603095616/64533923000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f64bc039-8112-4ff0-bef5-a2a0b2a19c41/xonisujupajudakebezuz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc655159955c744b5606702/t/5fccffe27ae85b53b294e26d/1607270371068/25543772960.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f8f692c50b1a1e77efcd/t/5fc316879ee0f32b87b8ea3a/1606620809151/32093080776.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aaa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA3 5420 bytes
SHA-256: 7db8005b2ed42b8cc299b733fae92bafa1ef0b782acbf758998887de61ca59e4
font_01_sfnt_off0000bcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD9 10224 bytes
SHA-256: ec3316bc12f6f6674b9a7a0bac88d75fbf4526605e10179546d0d23a9c86af97
font_02_sfnt_off0000deb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB1 17048 bytes
SHA-256: 13b5da129c5267601f460766eaa17f4ca60be35d56f0b6970267f25dd9526e99

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