Malicious PDF — malware analysis report

Static analysis result for SHA-256 db98f244e8628987…

MALICIOUS

PDF

102.7 KB Created: 2021-02-03 07:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3780c95d88d6cf0b19aaca38a8c23b11 SHA-1: 260fbbcd999108577a15109c1451160aa5d8ec7b SHA-256: db98f244e8628987ad446b3bfa9ffbc7ac0069e6e1a2302f67cae40c3f0bb647
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The presence of 'Jessica Lange net worth' in the document body and a URL parameter indicates a lure to attract users to a collection of potentially malicious or scam-related websites. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to its structure and embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://maypoin.ru/123?utm_term=jessica+lange+net+worth PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377936/normal_6006abb9abfd5.pdfIn PDF document text
    • http://100naturals.fun/tijuvamepilanivq3i8j.pdfIn PDF document text
    • http://sokfresh.fun/pafofakenizirujuwurimenly7a.pdfIn PDF document text
    • https://nasuzezigoma.weebly.com/uploads/1/3/4/5/134587751/4022122.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxoporerom/MgjBjek/classic_arcade_emulator_68_games_on_android.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/Y3aggns/fast_way_news_today_ludhiana.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/gOjhib3/57836694045.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417983/normal_5fcc6207eac0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465557/normal_6015c44e45ff7.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/hagj9H5/offroad_kings_money_hack.pdfIn PDF document text
    • https://vowipolijej.weebly.com/uploads/1/3/4/7/134713390/tulalagoripedemijiv.pdfIn PDF document text
    • https://benefirezunaxo.weebly.com/uploads/1/3/4/8/134864331/5706908.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00015539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15539 5144 bytes
SHA-256: 6666a82005f502502f1bb2a6859c7eb5386e1562569f16a0580934ab0fe53f73
font_01_sfnt_off000166c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166C0 12180 bytes
SHA-256: a9b4253dfa80b89edaadc849b4089d2282b5917a5c316ca2c3737f43953d6ca1

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