Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f55a7430adaf693…

MALICIOUS

PDF

102.3 KB Created: 2021-04-21 13:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 744cc970f3e15f146645a87ac1111b17 SHA-1: f781d0b3c32357f2b1cf889cfb2eb00a3de525f3 SHA-256: 2f55a7430adaf6930dea3051a93e81349f7e87ab9022e3175200d177fdd2b772
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable hosting, indicating a link farm designed for SEO manipulation or phishing. The primary malicious URL identified is `https://fokemale.ru/strik?utm_term=lakshmi+ashtothram+in+telugu+free+download`, which is presented as a free download lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

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://fokemale.ru/strik?utm_term=lakshmi+ashtothram+in+telugu+free+download PDF link annotation
    • https://ferugagesavisux.weebly.com/uploads/1/3/4/6/134687542/vuwanig-mujitagididefe-widulizesu-binojuzesuna.pdfIn PDF document text
    • https://cdn.sqhk.co/niwonosorude/jdjTijc/35445361979.pdfIn PDF document text
    • https://midodelawipage.weebly.com/uploads/1/3/4/5/134585137/dutixerifakibenoxu.pdfIn PDF document text
    • https://mabelemaje.weebly.com/uploads/1/3/4/7/134705401/poluz.pdfIn PDF document text
    • https://vokarojunez.weebly.com/uploads/1/3/2/6/132696330/a782ece691e.pdfIn PDF document text
    • https://jumufewaxijakuk.weebly.com/uploads/1/3/1/3/131380308/13053.pdfIn PDF document text
    • https://fojojaroj.weebly.com/uploads/1/3/1/4/131453509/bobodebusege_dusemuredu_pememiw.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/Gihfy5F/pick_a_brick_cup_lego.pdfIn PDF document text
    • https://ratesikumetu.weebly.com/uploads/1/3/1/1/131163578/javixirokasinenila.pdfIn PDF document text
    • https://cdn.sqhk.co/xizefonuma/1c3if3I/wiritor.pdfIn PDF document text
    • https://cdn.sqhk.co/gigijuke/eDAjfse/fuzofimole.pdfIn PDF document text
    • https://sapakuso.weebly.com/uploads/1/3/5/2/135297556/511fd827.pdfIn PDF document text
    • https://cdn.sqhk.co/loziromegon/dKylRiM/ninjago_castle_lego.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/taguxif/dns_benchmark_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c760d791-69f4-4456-8a55-a55eba2d42b6/is_mcgraw_hill_publicly_traded.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/mepamel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c72829cf-249f-4d51-bdb4-622c932e34e7/excelsior_college_nursing_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba387b8-8aae-41e2-b964-f6d13ff7c51b/cards_against_humanity_online_2_players.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a4984e1-b8f9-466f-9e3b-57a1b4b6feee/flowers_for_algernon_characterization_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/35501089587.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/wojubusijokakevodavidumi.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/63682128742.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 5416 bytes
SHA-256: d162dd5c542319929157f74bbe3cdc454c25ddff2a08a7bd42d59d48f7ee3c19
font_01_sfnt_off00010ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE6 47728 bytes
SHA-256: a4c6e138dcd9c8e5fd32fda6bb5f8749799212c8288eb4735cc3b79672ef9c65
font_02_sfnt_off00016433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16433 10428 bytes
SHA-256: 9b49e97bb53fa206d23268869cf29c603bb135e9c6f084cc85523182c8a80e0b