Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d16eaf9a110f59…

MALICIOUS

PDF

80.0 KB Created: 2021-03-26 08:48:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 412e613d8882dcf556c404007d295a10 SHA-1: 22567dc4d7f39f60d2d1f77682af1e74ba7d2c64 SHA-256: c1d16eaf9a110f5978d350eab192b15db33b02efa8a67f372d79ef224bcb91a0
186 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links pointing to various domains, many of which are hosted on disposable or suspicious platforms, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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://jottigo.ru/strik?utm_term=angel+care+baby+monitor+not+charging PDF link annotation
    • http://rijigikesezaga.mypressonline.com/beautiful_life_goblin_piano_sheet.pdfIn PDF document text
    • http://albatros-trans.ru/how_do_i_reset_my_afterglow_controllerld5ab.pdfIn PDF document text
    • http://wupunekum.getenjoyment.net/accounting_theory_7th_edition.pdfIn PDF document text
    • http://disconto50.pro/209518452093lmdf.pdfIn PDF document text
    • http://vadanunagirira.getenjoyment.net/balika_samriddhi_yojana.pdfIn PDF document text
    • http://gagogepatajebe.medianewsonline.com/kupaxogadud.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/58872943224h4pxw.pdfIn PDF document text
    • http://tamekawarol.66ghz.com/google_chrome_for_windows_10_microsoft.pdfIn PDF document text
    • http://nirenodeba.medianewsonline.com/99149149341.pdfIn PDF document text
    • http://gukevipagopu.mywebcommunity.org/70870420634.pdfIn PDF document text
    • http://lifokuvaxodime.iblogger.org/32785551805.pdfIn PDF document text
    • http://zefutuwukeras.getenjoyment.net/xitufemerojanofu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suvumudupese.epizy.com/gusip.pdfIn PDF document text
    • https://51364a6b-283d-4537-b9df-48522fd8faf2.filesusr.com/ugd/921180_09b0b24280cc4253875fb13e85ce7ed5.pdf?index=trueIn PDF document text
    • http://kepewitibafef.myartsonline.com/wiritiluteforarusexumomo.pdfIn PDF document text
    • http://kafuxuf.epizy.com/69477533830.pdfIn PDF document text
    • https://f6b99bba-f064-431f-ab68-6eacb91b2703.filesusr.com/ugd/35e1ce_25d6300d18f84d6a84a68f576398557e.pdf?index=trueIn PDF document text
    • https://0fecb50d-c8db-4b5c-a67e-01a13b1c0e9a.filesusr.com/ugd/da7c2d_74873de3011b4d9b9427d1d70a671c43.pdf?index=trueIn PDF document text
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_ff14ab09d3864f2c9e8fb010e7a52376.pdf?index=trueIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_c1bccdfa75724e4fb83ae81792887cf7.pdf?index=trueIn PDF document text
    • https://b3695a61-a5b7-457a-863f-99677d03e0cc.filesusr.com/ugd/f2a82d_1709ab966ad84e48b347f392e1230e9e.pdf?index=trueIn PDF document text
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_8feed73e46384ade901f1e39fc1b3cf7.pdf?index=trueIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_3407f161f29c4258969bfcac2b9edf90.pdf?index=trueIn 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_off0000fad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD5 5264 bytes
SHA-256: ceb0ad8c9afb4d34d10ad337097f09fb42eb4d98d3318d000a443eb68ea20d3f
font_01_sfnt_off00010c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9E 11112 bytes
SHA-256: 4f673bacb7f77e7271bc8b66840ca5c1ca6c1ade54bffbcd26eb2fd97190b0cb