Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f693145b6bd5659…

MALICIOUS

PDF

78.2 KB Created: 2021-03-06 10:32:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5595bc8a24cc41d12466018a58baeda4 SHA-1: 117d9db48288cb7e2166b19e947cda694ca7c51b SHA-256: 0f693145b6bd5659391da800f35c4b3102efea91878fd8a6a192b85b698bee84
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 0.9992

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://gimoguvi.ru/strik?utm_term=why+isn%2527t+my+dishwasher+drying+my+dishes PDF link annotation
    • http://zisezamerares.mygamesonline.org/67064468102.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/81015699596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417807/normal_60241cb364ef4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448332/normal_6039d5f3a8590.pdfIn PDF document text
    • https://wobereresexo.weebly.com/uploads/1/3/1/6/131606335/5067d0dfd8a328.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446759/normal_5fdccb2ea1e73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470224/normal_60255e9f9a65f.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/alone_together_fall_out_boy_remix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476434/normal_603ccd11e4165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424953/normal_601fcb8e29965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485927/normal_6014523a8432a.pdfIn PDF document text
    • https://somalinoduka.weebly.com/uploads/1/3/5/3/135392385/piwojusi_sipafemovosan_kepagaxujodaza.pdfIn PDF document text
    • https://lewuroluloxujul.weebly.com/uploads/1/3/4/6/134678017/firokesate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490953/normal_5fd774eae6698.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/930043d2-acf3-45c9-ae52-36c9ec5fbf80/what_is_the_disease_als.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49608cac-7004-4013-af4b-a77fba132e3b/honeywell_thermostat_th8110r1008_forgot_password.pdfIn PDF document text
    • http://zejusamipokera.myartsonline.com/zopovezoralawanurogilolax.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/53223332975.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/fawoxomijikudofapijeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb1add7-06a3-4dbd-bd6b-d0d284c71a28/how_to_write_a_body_paragraph_for_an_expository_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0055c850-e508-4205-b75b-251bca554191/8512772779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b024b1-bae6-4efe-a773-d1b08a991008/76142870862.pdfIn PDF document text
    • http://nukivamo.myartsonline.com/fopavewuwa.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_off0000f457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF457 5448 bytes
SHA-256: 33980fa1bb122c616ae328187844c32ceedea51597cc7da2c10208dbce718343
font_01_sfnt_off000106d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D5 10576 bytes
SHA-256: df45ffad1b8682467a78a99ddd56a4d0460f23b36d0e247ae1f95453776aedf0