Malicious PDF — malware analysis report

Static analysis result for SHA-256 981e6e6947352f4f…

MALICIOUS

PDF

101.9 KB Created: 2021-03-13 18:22:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4b10b48098f601659b4b0347e00bd5d1 SHA-1: 114c79241cf17b72010113bc8a431d4ee41e2456 SHA-256: 981e6e6947352f4f641506283e46a937b407192675dca8055124bf053304df8b
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • 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.
  • 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://botokaw.ru/award?keyword=hyundai+tucson+brochure+pdf+egypt PDF link annotation
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/6216629.pdfIn PDF document text
    • http://vobigabifinu.22web.org/number_theory_and_cryptography_coursera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_60248842a6e1b.pdfIn PDF document text
    • https://bituxusod.weebly.com/uploads/1/3/4/3/134347303/1652838.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483851/normal_5fc5ae7c8f929.pdfIn PDF document text
    • https://jigugelelatowo.weebly.com/uploads/1/3/1/4/131437208/juxegasigi.pdfIn PDF document text
    • https://sitekitenuzuvi.weebly.com/uploads/1/3/2/3/132303150/vatijipaxu.pdfIn PDF document text
    • https://regisaralox.weebly.com/uploads/1/3/2/6/132681556/9840034.pdfIn PDF document text
    • http://lifizix.22web.org/chocolate_hd_pic.pdfIn PDF document text
    • https://feditesar.weebly.com/uploads/1/3/1/4/131483001/4ca5ddce37b.pdfIn PDF document text
    • https://safesawugu.weebly.com/uploads/1/3/2/8/132814337/zimosegufetaxas.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/feliso/55285941990.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/88648801956.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/rawekuwidunewidowinetijo.pdfIn PDF document text
    • http://duvaneloxa.epizy.com/24007692641.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/seiko_chronograph_manual.pdfIn PDF document text
    • http://nowaginog.epizy.com/anestesia_raquidea_efectos_secundarios.pdfIn PDF document text
    • http://norezodo.rf.gd/97443619292.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/attn_format_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/acer_aspire_e5-_573_drivers.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/bonus_box_tops_for_education_submission_form.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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
stream_005_off00015367.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15367 31476 bytes
SHA-256: 83c8413fb932d76b487a4d44cf4734f162d03c3cf449c513a859543ad0fb78a7
font_00_sfnt_off0001197c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197C 5588 bytes
SHA-256: 90edd370e8572e4f4fbe330cc908d04c906e58e831d5c20c47cb2f195a26b1d7
font_01_sfnt_off00012c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7B 11528 bytes
SHA-256: 83a254ff0d89d0f2de4b9ca4605529ac1acb989a390079d8ec914cb7840914ab

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