Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ff09b452b73260…

MALICIOUS

PDF

87.2 KB Created: 2021-06-09 19:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 80614931a69a7250d300e2f874179488 SHA-1: 2e1360f1ac9624824782b6e9b0389506740cbe4d SHA-256: 72ff09b452b73260c12fca3eb57924870c6351bb17226c588916cd003d800e9e
186 Risk Score

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. 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 0.9983

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://nomylo.ru/pbw?utm_term=moveset+aggron+pokemon+go PDF link annotation
    • https://revawowi.weebly.com/uploads/1/3/5/3/135317167/xezarema-komuvi-fobodemelotidus.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/laduxu.pdfIn PDF document text
    • https://bozetefaz.weebly.com/uploads/1/3/4/7/134733050/07411.pdfIn PDF document text
    • https://marezupudi.weebly.com/uploads/1/3/0/8/130874377/jonamasamef_pizev_wuxafolu_vazuguzitoxiv.pdfIn PDF document text
    • https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/sinotow.pdfIn PDF document text
    • https://konilusikiwi.weebly.com/uploads/1/3/3/9/133986353/buvomo-daviropu-kotoxoxivegox-rojoxidonoraja.pdfIn PDF document text
    • https://lewofadexireg.weebly.com/uploads/1/3/4/8/134868993/330abe75160e4d.pdfIn PDF document text
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/podanu.pdfIn PDF document text
    • https://kurasapar.weebly.com/uploads/1/3/4/9/134902571/bodafelup_kubogizek_lofowelebumemag.pdfIn PDF document text
    • https://nejonuresuf.weebly.com/uploads/1/3/4/8/134897458/6543486.pdfIn PDF document text
    • https://zefojakafi.weebly.com/uploads/1/3/0/7/130776787/nugodekoka.pdfIn PDF document text
    • https://xamoguxa.weebly.com/uploads/1/3/0/8/130874300/kipixokirukivit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bofamawetodo.pbworks.com/w/file/fetch/144443724/52759239154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ea4de31-ac50-4aa9-8a9f-43ce8b840838/tevewagadurenuwufaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aa6944a-5745-4f63-965f-be77163c0596/common_english_words_used_in_daily_life_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4f3c9b9-5a0f-48b6-89a7-26391b3f2a19/cengiz_han_film_mzii_indir.pdfIn PDF document text
    • http://jowenoxo.pbworks.com/w/file/fetch/144883419/harry_potter_movies_free_download_in_english.pdfIn PDF document text
    • http://gufabewa.pbworks.com/f/21282019504.pdfIn PDF document text
    • http://vulazojab.pbworks.com/w/file/fetch/144552597/meganowelizuvifatamijuvum.pdfIn PDF document text
    • http://jajafad.pbworks.com/f/how_to_descale_ambiano_coffee_pod_machine.pdfIn PDF document text
    • http://wenitudodub.pbworks.com/f/solid_state_physics_mcqs_book.pdfIn PDF document text
    • http://dipoziw.pbworks.com/f/24555575434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f7e2bc1-f46a-4a8e-84a4-03b280bca035/maze_runner_2_ending_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ca01c4-1132-4677-afc1-ccbd2c76244b/resistance_training_band_exercises.pdfIn PDF document text
    • http://matekid.pbworks.com/w/file/fetch/144660228/coin_master_daily_free_spins_app.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29D 3352 bytes
SHA-256: 404a97f8bdeb571d436f564757517d8aa2e814182416ad0ceed40960c2a680c4
font_01_sfnt_off0000fe99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE99 5236 bytes
SHA-256: 80a808ff039cb886ad466ad2fed666feadc473783c7eecad3c18ead833b5e55a
font_02_sfnt_off00011073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11073 11588 bytes
SHA-256: c330a8cc009583bf52553ef9eb7fc5589dc706c8828f2733255023b06b9ee0ab
font_03_sfnt_off00013737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13737 16372 bytes
SHA-256: 132ae43d955de9dfa2b3116d95d01e2bccb97f2fd48abe696f4b43e18e96acbf