Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d9eb3252b019da…

MALICIOUS

PDF

70.2 KB Created: 2021-03-31 00:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 07c1142a98844f003b0a0d9308fd5d3d SHA-1: 726dae14bb8bcfc0fe1a2c2d2bbf3b86db138a9d SHA-256: 75d9eb3252b019da2e6955c7a31e80c02e0067999feee46f5a6b28ad0964c97a
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of a large number of external links, many hosted on disposable domains, strongly suggests a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://golowaki.ru/wix?keyword=asi+se+dice+level+3 PDF link annotation
    • https://woxumonukoke.weebly.com/uploads/1/3/6/0/136090180/paxalawiwabon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_603a7467d2c05.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/qAhbnFS/children_s_halloween_movies_on_hulu.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/9ihgiid/rumefotij.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/qlR4jiN/82148731897.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopiroxab/hdhhEhc/find_someone_who_icebreaker_template.pdfIn PDF document text
    • https://gedesinikus.weebly.com/uploads/1/3/5/3/135323437/kakumakadovakosapiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402294/normal_5fc7e0737d638.pdfIn PDF document text
    • https://jegagevo.weebly.com/uploads/1/3/4/1/134109204/0f495e05.pdfIn PDF document text
    • https://tewafegode.weebly.com/uploads/1/3/5/3/135350941/b1ca3803ea2.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/WCpibmx/big_bang_full_song_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/igjUieB/matplotlib_line_color_gradient.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/ii1iegj/lucky_knife_earn_money.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392444/normal_5fde4cd29d688.pdfIn PDF document text
    • https://cdn.sqhk.co/tijanukubo/YhcucR7/filibajoxatob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446147/normal_601db908b5e4f.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/Mhefidl/midonira.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/834af051-fbc3-4d8d-8e88-63353196299e/daxaboxigofufovebinaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/memererifokanoxogikolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70249148-f88f-40bb-8577-f42e7b320623/zasabogozos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73036a92-27b0-4b94-aa08-909759fd142c/epson_surecolor_sc-p800_a2_printer_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ae22321-6eaa-4ee2-aa9c-ecfd7e0ea20b/batapoxixodinorozo.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/what_is_anaerobic_lactic_glycolytic_energy_system.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/61164624171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c45314a1-1762-4780-88bf-e402c55f35fd/12752327642.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/pretty_little_liars_book_4.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_off0000d6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EB 4840 bytes
SHA-256: b914dc352765b30045b20a5ddec4ff7e03f9d260547095d20aa623f6235ed54e
font_01_sfnt_off0000e787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE787 10460 bytes
SHA-256: 2fee287cff0705f0fe2c1d79e1b9bea7678eaca9e00576927ad7e9164f93a248