Malicious PDF — malware analysis report

Static analysis result for SHA-256 42185801cedfec6f…

MALICIOUS

PDF

85.7 KB Created: 2021-03-16 05:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1cf338547942a90ce22e093eb53a50fc SHA-1: bb0e74195f889f2a5c471f494431b646b0b6f036 SHA-256: 42185801cedfec6ff94a962ca72cee89361da27e5583474ee1671959695a3275
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a callback phishing scam. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to 'fishing report' and the authoring application, which is likely a lure to disguise the malicious intent. No scripts were extracted from this sample, but the extensive use of external links and the callback lure heuristic strongly indicate a phishing attempt.

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.
  • 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.
  • 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) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://midufefew.ru/123?utm_term=fishing+report+wildwood+nj PDF link annotation
    • https://cdn.sqhk.co/dagosasojo/fjxQDK9/dupupemiru.pdfIn PDF document text
    • https://kuwiliwal.weebly.com/uploads/1/3/1/3/131378779/6b02d7ffcaa8.pdfIn PDF document text
    • https://lutavazakagege.weebly.com/uploads/1/3/1/3/131398084/87c9d4.pdfIn PDF document text
    • https://cdn.sqhk.co/mudonisogub/980hiia/18026830229.pdfIn PDF document text
    • https://tirokaroxere.weebly.com/uploads/1/3/2/7/132740449/f95cd40067a34bb.pdfIn PDF document text
    • http://shoes-storie.club/inorganic_chemistry_meaning_in_hindi5jzql.pdfIn PDF document text
    • https://cdn.sqhk.co/ninivaxibab/KpgjGij/kiropu.pdfIn PDF document text
    • http://verenica.net/nizerilojanisefu6pahg.pdfIn PDF document text
    • https://cdn.sqhk.co/tesadubozino/eqhcge5/talking_lion_king.pdfIn PDF document text
    • http://topitoxituzoju.iblogger.org/network_security_engineer_jobs_in_houston.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a02cd3e-23f1-4ab2-875f-0e5885f73acf/snapper_riding_mower_for_sale_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e43b643-1d37-47e2-80ff-f370a574b6ef/lopanazifumivikarit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/777d2e21-34bf-4521-aa03-451315cd84a9/homer_iliad_greek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a8ad9e-34db-4801-a8f4-9d8b498138db/french_verb_conjugation_practice_audio.pdfIn PDF document text
    • http://refofigeto.epizy.com/reporter_tv_malayalam_news_channel_live.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23cba59c-135c-496b-8f47-c9bb38a584b0/81611887686.pdfIn PDF document text
    • http://jiwigazuvix.rf.gd/acute_kidney_injury_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38cfb3d6-8a95-4037-baaf-0bc72096c6c7/2013_dodge_charger_se_0-60_time.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7E 5132 bytes
SHA-256: fcb14a2714d8860dbf0c71c0d3cce7909c89ed8dfa5abdbd8a0edac9d429a235
font_01_sfnt_off00010c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0C 11396 bytes
SHA-256: fb751874c911cb9d35b02395041c4bb194062456a856795f8158f3658e8796e5
font_02_sfnt_off0001330a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1330A 16544 bytes
SHA-256: 49230a07578f2a0b108554ff1d47b1cb24b8f8081254bad551c0ce72ea05e0a5

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