Malicious PDF — malware analysis report

Static analysis result for SHA-256 225e32dfa4a068cf…

MALICIOUS

PDF

67.0 KB Created: 2020-11-29 11:47:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a154e94dbf5c7a90489abceb30ecc187 SHA-1: 119f2af2b1da9ade93623f1cb93efb458f2f41d3 SHA-256: 225e32dfa4a068cf8dbe2ba117c6e5b64fea965e1402c3bcc4cc26c8d39ce59f
234 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 was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=how+to+cancel+crunchyroll+on+iphone In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_5f8b694bbaa6e.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/wofujevofe.pdfIn PDF document text
    • https://pijafajabivigin.weebly.com/uploads/1/3/4/6/134635516/rodarubapipe-tokusoz-metoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_5f9669e085622.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/tobojelusiwi/linea_base_ambiental.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c141b71d-1ce9-4590-9e62-806141bd2d96/bobscnc_e3_cnc_router.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a382cbd-e01f-4620-b1ed-1ddce64981fc/77154263279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb13491f-0515-4bef-835a-249ecc152607/51926892767.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/samsung_sm_n900a_price_in_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/complementary_and_alternative_therapy.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/dra_guided_reading_conversion_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c326312-3707-48a4-a5ba-ea07ce70f20d/20391658659.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/biogas_stove_design.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/teamviewer_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/74608708436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16673d8a-954f-4d3d-9b9e-c09887565bb1/act_science_practice_test_2020.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_off0000caad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAD 5000 bytes
SHA-256: 1df16e7663925b4142a9828e9cc23ab154b96093766b3307c5749efedcdba213
font_01_sfnt_off0000dbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC1 10192 bytes
SHA-256: dead3d00bdbd9b3aa6dc353fbabd8f2c32b34afec245c64f1c57771bcf4a5afc

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