Malicious PDF — malware analysis report

Static analysis result for SHA-256 179bf7b9523f1b76…

MALICIOUS

PDF

82.7 KB Created: 2021-03-12 19:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0d1f9f0373c04935b9c61f36fd080ceb SHA-1: 9554670b9388e67826144044eb57e23f61ffb7aa SHA-256: 179bf7b9523f1b76635232c9f24c2977040cb6262d1080f23e6760c50d95996d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9997

Heuristics 5

  • 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 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://jottigo.ru/aws?utm_term=macbeth+act+4+scene+1+royal+shakespeare PDF link annotation
    • https://cdn.sqhk.co/nefakovuwot/FhdGhjU/20893401015.pdfIn PDF document text
    • http://sexesex.site/learn_english_speaking_book7ovx1.pdfIn PDF document text
    • http://maxobujixeweden.sportsontheweb.net/66791416491.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/metowatofefakila.pdfIn PDF document text
    • http://vizionsmc.net/solopadvgthw.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/html_link_to_download.pdfIn PDF document text
    • https://delidenaluno.weebly.com/uploads/1/3/4/4/134438050/e8be9ce9ae9c5.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/Q6bgjVj/lagu_eisner_nala_pesan_nuju_sulu.pdfIn PDF document text
    • http://zuvatewovu.scienceontheweb.net/how_to_turn_off_flash_on_polaroid_sun_600.pdfIn PDF document text
    • http://artrosil.xyz/20524562662nfe87.pdfIn PDF document text
    • http://vosojivaru.mypressonline.com/tanozapofades.pdfIn PDF document text
    • https://cdn.sqhk.co/jagojixego/K3idSjc/fofegerulururad.pdfIn PDF document text
    • https://cdn.sqhk.co/mekibekowufe/gjgcBb9/teladusetuzedugomajagato.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sokevigaku.rf.gd/79812823844.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/design_sponge_city_guide_portland.pdfIn PDF document text
    • http://sebafasoro.epizy.com/61132508685.pdfIn PDF document text
    • http://doxekapop.rf.gd/nursing_dosage_calculation_practice_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/booz_allen_hamilton_email_address_format.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/65969493263.pdfIn PDF document text
    • http://tikomiwewo.atwebpages.com/11412591675.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/ap_calculus_textbook_larson.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10667 5472 bytes
SHA-256: 3eacb2ab2db72b8e728a86b0b80ca72ebe329bdf1ce7cf0bdec8f7e0d4cb7227
font_01_sfnt_off0001191a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191A 10684 bytes
SHA-256: 5b04a11fabd5a53b56a8b4c8188e36eed57717868715202729a1b48250047495

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