Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46467b5236cd634…

MALICIOUS

PDF

80.1 KB Created: 2021-02-04 04:53:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 182f14d92133a1ea461ae696229d815c SHA-1: 2746be8b4db44a025a82bafae4aba9d2521b21e6 SHA-256: a46467b5236cd634a771a4f873a5a2ae0f9892d0413d0aa5882d0cf01b3709b8
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/aws?utm_term=mainstays+flannel+sheet+set+queen+red+plaid PDF link annotation
    • https://volorizog.weebly.com/uploads/1/3/1/0/131070051/wiweluxomibuwadibevo.pdfIn PDF document text
    • http://fb-ig-copyright.com/65055103314iajas.pdfIn PDF document text
    • https://gubagomokugexat.weebly.com/uploads/1/3/3/9/133988684/pavemexe.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/jeviwovanezigen_juvesojumabeke_bolesabenevu.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/jeT3iii/12368972252.pdfIn PDF document text
    • https://muzuxagofonokow.weebly.com/uploads/1/3/1/4/131406885/zozinasujivasi_jagetisidagozir_zorojip_galeruvivojus.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/cvhjzec/bingo_party_food_ideas.pdfIn PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/bebik.pdfIn PDF document text
    • https://zakuxaposud.weebly.com/uploads/1/3/1/3/131382531/fb1c9e4d2e.pdfIn PDF document text
    • http://fallofelin.online/teenage_mutant_ninja_turtles_theme_song_lyricskf321.pdfIn PDF document text
    • https://punizino.weebly.com/uploads/1/3/4/3/134327780/zejetobobaxomub_denobelivuxotu_ripezipen.pdfIn PDF document text
    • https://cdn.sqhk.co/dowusutitozi/hfjbzia/asana_yoga_definition.pdfIn PDF document text
    • https://zoxuzula.weebly.com/uploads/1/3/4/4/134489613/844499.pdfIn PDF document text
    • https://siwuxamafovad.weebly.com/uploads/1/3/4/4/134489720/wagokuwolape-wexiwawol-pivusidiw-bugixovov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zerepuzuze/rapepifopasofulof.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/dofevila.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/xibumuk.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/animal_information_report_template.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC50 5136 bytes
SHA-256: fc70c2b760874d6d9694f526bdaa77b7d85c4dc4b3dd8c4bbbd623d1acdca5c6
font_01_sfnt_off0000ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 2328 bytes
SHA-256: f31c637376c9808ad8935aeb8da5d5e991fbff0630c28cc3129d242addd1c9f4
font_02_sfnt_off0000e811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE811 10756 bytes
SHA-256: f13a7812fcda791ac33c367ac24fdff084ace8fc7c7deee20eccdffab836614a
font_03_sfnt_off00010d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D21 16544 bytes
SHA-256: 4354bd37e85197a997b2f6c8c8698034d2711068b41d1b66819094364c364bcc
font_04_sfnt_off00012365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12365 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e