Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae1f3cadee2a735…

MALICIOUS

PDF

73.5 KB Created: 2021-03-12 00:42:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c56a4d917a1a143c46fe021bafe6a88b SHA-1: fedf1959c82b50201992cf983f88430d7fc98649 SHA-256: dae1f3cadee2a735de86e29ed3f895b8b5adff78f5969749dfc769f3d81ac94d
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, with one prominently featuring 'matlab mesh circuit analysis' and directing to a suspicious domain. Heuristics indicate it's a link farm on disposable hosting, and ML classifiers and ClamAV strongly flag it as malicious phishing or a trojan. No scripts were extracted, but the primary attack vector appears to be directing the user to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=matlab+mesh+circuit+analysis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403130/normal_601f61b099e02.pdfIn PDF document text
    • https://cdn.sqhk.co/zipedufipiz/jizhfqw/67086312355.pdfIn PDF document text
    • http://tivunuvuzamiguj.22web.org/97433384240.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/gibp7yG/marvel_comics_wiki_sentry.pdfIn PDF document text
    • https://nakaporona.weebly.com/uploads/1/3/1/4/131438848/7377458.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/hd0Ijhd/space_movie_1992_meme.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/ea200de.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/sidihRE/fuwodawiwowokidavudip.pdfIn PDF document text
    • https://cdn.sqhk.co/nesuxozajek/jncoLjg/coming_soon_page_template_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420222/normal_600fda8998ed3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406481/normal_5ff10987c1eef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakalugofiw.rf.gd/simcity_4_deluxe_mac_review.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/71677744359.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/reference_sheet_baseball.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/huanyang_vfd_inverter_manual.pdfIn PDF document text
    • http://wozowopug.rf.gd/36753516986.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/64651995723.pdfIn PDF document text
    • https://836291d8-7b77-40db-be8c-3105928c7ef3.filesusr.com/ugd/aae074_e24156f8621c4ab69c8d890a803c125a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/94189565043.pdfIn PDF document text
    • http://nixuzisopufagok.rf.gd/quebecois_french_guide.pdfIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_80d4f818866642ec9f725c75ed5f63ef.pdf?index=trueIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_01344df4af804f599ac9bdd03ab519b5.pdf?index=trueIn PDF document text
    • http://xogonat.epizy.com/trane_xr90_pressure_switch.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7E 5284 bytes
SHA-256: a8555efc4c81c392988f82d989a6e6c8c728a7d9594ae05a955ddd69a2dca7f5
font_01_sfnt_off0000f15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15B 11532 bytes
SHA-256: c7162b4c573bb5c68525fa6e6b803cdc864018e53f5c352856baae25a4837154

Open this report in the interactive analyzer, or submit your own file for analysis.