Malicious PDF — malware analysis report

Static analysis result for SHA-256 c545acd3d150d743…

MALICIOUS

PDF

80.5 KB Created: 2021-02-19 12:28:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: eabd1471e08b708dd97f3c842cfe6cbd SHA-1: f30b73f36076ac5e22469f2389a4b65794ba21fc SHA-256: c545acd3d150d7439bb7d7f0e2e93e9f811e070859bfc4a9e622a81f061e2a0e
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting it is part of a link farm or SEO spam operation. The embedded URLs and the document's apparent content related to a car alarm issue suggest a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/123?utm_term=hyundai+santa+fe+alarm+keeps+going+off PDF link annotation
    • https://xetakafiso.weebly.com/uploads/1/3/1/8/131856826/4978589.pdfIn PDF document text
    • http://bristol-yalta.run/pimapisiminin5wpht.pdfIn PDF document text
    • http://philonio.online/wixemapotenupirozof2wo16.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/lsV2ihm/58422415561.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/g2higgQ/53091688795.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/aMZlLii/83530756015.pdfIn PDF document text
    • http://teaapple.space/rumaveraw62of.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/wjiajgO/19158020431.pdfIn PDF document text
    • https://folutiniku.weebly.com/uploads/1/3/1/8/131871586/midorazezawutu.pdfIn PDF document text
    • http://bezprovodov.guru/managed_file_transfer_gartnermn441.pdfIn PDF document text
    • http://dompodklyuch.com/cyberghost_6_crack_free_apklx4s9.pdfIn PDF document text
    • http://supfitket.buzz/sonic_cd_classic_apk_mod4c9f6.pdfIn PDF document text
    • https://cdn.sqhk.co/kupawusel/hhJidkE/movie_judy_now_showing_near_me.pdfIn PDF document text
    • http://8bitbeardsco.com/new_baby_images_free2wwb5.pdfIn PDF document text
    • http://nonly.xyz/vekobogexatinatotikiseflechp.pdfIn PDF document text
    • https://cdn.sqhk.co/minederepa/hdYggjU/dekawex.pdfIn PDF document text
    • http://wordsidepost.top/install_aircrack_ubuntu_18.04oh31c.pdfIn PDF document text
    • https://lipojiwogim.weebly.com/uploads/1/3/0/7/130776075/sikavomex.pdfIn PDF document text
    • http://mnatural.space/70870074636crtu7.pdfIn PDF document text
    • http://porn77.design/365711910347kxb5.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/hiGgevF/knight_rider_kitt_for_sale.pdfIn PDF document text
    • http://idealicaitalia.website/ignou_assignment_submission_slipnqc6z.pdfIn PDF document text
    • https://nogigeto.weebly.com/uploads/1/3/4/6/134665346/lifux.pdfIn PDF document text
    • http://watertea.space/77646393394m99fb.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_off0000f915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF915 5488 bytes
SHA-256: 612edca53f2b0fb72fd6fa9a940b5d5255d47f83e9deb1b8faf496997d177513
font_01_sfnt_off00010bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB8 12860 bytes
SHA-256: 977ba8fe30294243f93dfc5fe21d0d2785b04b57f2c0c87df56e99f2fab7f926

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