Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aee994ce44abd80…

MALICIOUS

PDF

80.8 KB Created: 2021-04-20 13:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a19d4dd4f3a58fba7f3833fa2981c6d8 SHA-1: 329fb2af07c396bf2d112279b00e17e06dc0b2fa SHA-256: 0aee994ce44abd8025a78e161eabb524c271f234df035ade056adf8f8bd039a1
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicative of a link farm or phishing lure. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm its malicious nature, with the primary URL pointing to a potential phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=petsafe+wireless+dog+fence+home+depot PDF link annotation
    • https://cdn.sqhk.co/jigugabopu/Ddidgep/lifure.pdfIn PDF document text
    • https://cdn.sqhk.co/foxenikap/hd0hbhj/simple_boat_bill_of_sale_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408176/normal_5fe626eaeeafd.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/f0idhcO/dominos_voucher_september_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rovujesox/2HHligU/vocopro_wireless_microphone_system_digital_conf16.pdfIn PDF document text
    • https://cdn.sqhk.co/gotoruzud/Ys1nj99/dominos_near_me_menu_card.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_6016bb0a73d14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367947/normal_5fe4eea3c4368.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453528/normal_6001bd014d4d9.pdfIn PDF document text
    • http://sobofikikovir.22web.org/79023407229.pdfIn PDF document text
    • http://xumegexujarev.22web.org/tidulezaforox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485010/normal_60065a25e9167.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pobikifi.rf.gd/how_to_charge_a_nickel_metal_hydride_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/88911371469.pdfIn PDF document text
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_ff01570ddb9f459ca5072fe340c6e378.pdf?index=trueIn PDF document text
    • http://wuvasof.epizy.com/batuan_beku_jurnal.pdfIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_0710e66bbe7e43228912157b7719e674.pdf?index=trueIn PDF document text
    • http://tezuzatarezoz.epizy.com/unity_standard_assets_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/damodaran_on_valuation_flipkart.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_off0000f9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D1 5664 bytes
SHA-256: 95e3a27d2be69bb1932b69ef7156c29b38f8f5fdc1610afbb72cc01c4f5180a6
font_01_sfnt_off00010d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D04 12056 bytes
SHA-256: a4d61a37776cd013e41bf1838ccd8a8c94a53b01e8eaa75643ff3c3dac91eafa

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