Malicious PDF — malware analysis report

Static analysis result for SHA-256 907ab699844c4a2a…

MALICIOUS

PDF

71.6 KB Created: 2021-03-04 02:03:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 96ee727cd2fdeff2ab80913aa2ce38cb SHA-1: f6b7bf0783e5d9de258f1158f9a2601623ec1679 SHA-256: 907ab699844c4a2ab67a96d827156e677767503676d0f0901db339a5d8e13753
126 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains a large number of embedded URLs pointing to disposable domains, suggesting a link farm or phishing lure. The PDF's structure and the presence of external URIs indicate an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

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://midufefew.ru/award?keyword=celestron+astromaster+90+price PDF link annotation
    • http://alternativeinfluencenetwork.net/kinoconsole_pc_setup_guide2fory.pdfIn PDF document text
    • http://kurs1.xyz/insurgent_movie_freei0em5.pdfIn PDF document text
    • http://sbrf.link/craftsman_16_chainsaw_carb0vvjk.pdfIn PDF document text
    • http://fitnesspack.net/why_plead_nolo_contendereqxm9x.pdfIn PDF document text
    • http://milky-rp.space/90469288982nwdvh.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/54265400764.pdfIn PDF document text
    • http://reliables.ru/state_of_decay_2_legacy_boonsbw7c3.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/71727542453.pdfIn PDF document text
    • http://nanolenka.xyz/lochinvar_commercial_boiler_reviews21iwd.pdfIn PDF document text
    • http://theandyhong.com/pokeball_plus_auto_catch_caseg1ehm.pdfIn PDF document text
    • https://natesikapepik.weebly.com/uploads/1/3/4/7/134750077/1a014a3c6.pdfIn PDF document text
    • http://infonewstravel.com/button_html_onclickxhd0m.pdfIn PDF document text
    • http://pravagims.net/dekepavubojoujx0t.pdfIn PDF document text
    • http://italdom.fun/1859700566327zq0.pdfIn PDF document text
    • https://zitupakunetod.weebly.com/uploads/1/3/0/7/130739751/1676018.pdfIn PDF document text
    • http://workshop-fb.ru/muxukodoxenamalazexommme8m.pdfIn PDF document text
    • https://dadojunolibete.weebly.com/uploads/1/3/2/6/132683289/023539.pdfIn PDF document text
    • http://ultra0.space/70213261241kfai.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/apc_back-ups_es_550_owners_manual.pdfIn PDF document text
    • http://zebrait.fun/bobbi_brown_makeup_brush_caselyrzg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujapoguxesak.myartsonline.com/baserimizulapaxituga.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_off0000dc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC17 5284 bytes
SHA-256: 317201d01c2836dea330fda29373be23dedafa2131f111fe927c4a149d378ccd
font_01_sfnt_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 10276 bytes
SHA-256: 2189f36fdf843da577d43a61bd7bbdc12f026b3b297217cce76c2cedc53d1233

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