Malicious PDF — malware analysis report

Static analysis result for SHA-256 0154952bc237ea1f…

MALICIOUS

PDF

88.5 KB Created: 2021-03-28 20:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b2e863a003d2d6f42cd9c17879c4b59 SHA-1: 7de4b6c370a23a5b2832df82bb0f96d9fb44bbbc SHA-256: 0154952bc237ea1f8e98dc89a7d38cd1e54bf5c31c55ae522d811a3ed1ded7cc
196 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an advance-fee scam lure, indicating it is designed to trick users into believing they have won a prize or are eligible for a large sum of money. It also contains numerous external links, with one prominent link pointing to a URL that appears to be part of a link farm designed for SEO manipulation. While no scripts were explicitly extracted, the presence of external links and the nature of the lure suggest a phishing or scam attempt, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jacksth.ru/award?keyword=bsc+magazine+july+2020+pdf+english
    • https://vizodifoberesin.weebly.com/uploads/1/3/4/9/134900429/8946616.pdf
    • https://gikatufezido.weebly.com/uploads/1/3/4/3/134338368/5782103.pdf
    • https://povarudoro.weebly.com/uploads/1/3/5/3/135324530/fadus-feboxu-zubifexu-zojarogoma.pdf
    • https://wavupuzubeje.weebly.com/uploads/1/3/4/2/134235525/6601479.pdf
    • https://xadidevoki.weebly.com/uploads/1/3/0/8/130873902/pabojedojurifizigub.pdf
    • http://xarapover.mygamesonline.org/63309842971.pdf
    • http://mukinumatonewo.getenjoyment.net/penejoginonajugabi.pdf
    • http://kovativegapok.getenjoyment.net/34834888841.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wukevivetarapu.myartsonline.com/captopril_bula_profissional.pdf
    • https://uploads.strikinglycdn.com/files/dd509c32-47f4-4590-8869-b95eb2f20061/22257933001.pdf
    • https://s3.amazonaws.com/tuxexi/84239679967.pdf
    • https://s3.amazonaws.com/fajetufekejo/18698875411.pdf
    • https://uploads.strikinglycdn.com/files/6a1e06f5-a35e-4713-a66a-e617c6c5b7d2/what_is_the_latest_android_version_for_samsung_galaxy_s5_mini.pdf
    • https://s3.amazonaws.com/widiku/here_i_am_lord_send_me_bible_verses.pdf
    • https://uploads.strikinglycdn.com/files/c650e26a-8106-472e-97d5-21ee98fbdd58/ratoluzupolarulusiguxabax.pdf
    • http://jowawaba.atwebpages.com/91007692378.pdf
    • https://s3.amazonaws.com/mipeboro/sweet_baby_girl_images.pdf
    • https://s3.amazonaws.com/xujitezu/72044652118.pdf
    • https://uploads.strikinglycdn.com/files/2cd4bccd-d524-470f-9965-dce9e70e54ad/lebimojopigujamolelut.pdf
    • https://s3.amazonaws.com/dobesogum/feregewekawuxelijulezut.pdf
    • https://s3.amazonaws.com/tubukeganuji/basic_simple_present_tense_exercises.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a17.bin
f7b76f2f758c68d7bf4cdb627f3f5fbe1063aff5a5a5bf24c9b9c4cd62cf5521		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A17 6024 bytes
font_01_sfnt_off00012e97.bin
6a72b964d478df7f983fca3767fe98c02a81bfba19ee2a9b7d434a6498abcfed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E97 11220 bytes

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