Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ca4c532f6dd528…

MALICIOUS

PDF

69.1 KB Created: 2020-12-17 02:44:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 88f6e993c9c26560a111678b548a3e7a SHA-1: 5345379db40e09c7838431fa02b5c1a4854c3124 SHA-256: 82ca4c532f6dd528bee2a8f27f87464aa0d565fd85e6922e6046f17e6fea4430
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains embedded JavaScript and a large number of external links, indicative of a phishing or scam attempt. The heuristic 'SE_CALLBACK_LURE' specifically suggests the document is designed to trick users into calling a phone number, likely for fraudulent purposes. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=fulton+county+ga+jail+mugshots+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5fbff84d108bb.pdfIn PDF document text
    • https://zevenaxef.weebly.com/uploads/1/3/4/7/134745307/2014152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419425/normal_5faf6107c289e.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/6768121.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/kotenu/picsart_for_pc_free_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/citra_emulator_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/european_arrest_warrant_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/anjaana_anjaani_full_movie_moviescounter.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17203e2fce462bc8fc7f8/t/5fc43142cb3e0f5771d49f39/1606693186504/42474908732.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e155104edf1d7780ac3e/t/5fcb78c2551bdc47e7a8c988/1607170244236/gokirofigefoxinajawoxu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc568c38139af037663541a/t/5fc7b54f8f07963615843986/1606923599815/seal_beach_shark_attacks.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4cb348ef7301f8b29e6b1/t/5fd22e028ba64b78df5fd8b5/1607609858837/zaptiye_open_world_action_adventure_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc501b17d0c8f249d5b4547/t/5fcb02821880ce05e843397a/1607139970796/mobile_kitchen_for_sale_in_cape_town.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_off0000cf01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF01 5732 bytes
SHA-256: e0cc8148eab240e7ea7cda3a1b4c6148dfe04643e20b7a4a2994d5ebf9cd757f
font_01_sfnt_off0000e276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 10816 bytes
SHA-256: 3e09255665c32edc89a7500d14ba0ab596c2bbb7cf290ab2c82f1b18b73d6577

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