Malicious PDF — malware analysis report

Static analysis result for SHA-256 a049f4f053c7d7de…

MALICIOUS

PDF

78.9 KB Created: 2021-03-18 10:46:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2874a7d616b96a4da34ace07e42306fb SHA-1: 111e907fa268eed40ee30c5f33e0878f58bc65b0 SHA-256: a049f4f053c7d7deec88a45268b074c44adc766a2ddd22319c8b8511afec1267
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/wix?keyword=usa+vs+ecuador+h2h PDF link annotation
    • http://xukosususif.medianewsonline.com/komepedovuzejizujulubosi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418000/normal_60390a3272364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419644/normal_6023c9533e4ef.pdfIn PDF document text
    • http://bewujasixi.mywebcommunity.org/98726116110.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/acidosis_in_cattle.pdfIn PDF document text
    • http://bnl-jobs.com/beauty_and_the_beast_movie_download_in_dual_audio_720p0ds7x.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/kekimozapupipk1mso.pdfIn PDF document text
    • http://zabovawupe.mypressonline.com/why_isnt_my_hp_printer_not_printing_color.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427529/normal_5fcd07de2ef64.pdfIn PDF document text
    • http://marafonsport.site/matlab_plot_pointsf0gsx.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/wozesafugemnw8xm.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/telemetry_systems_engineering.pdfIn PDF document text
    • http://com-login8.xyz/japanese_textbook_minna_no_nihongoue043.pdfIn PDF document text
    • http://lavkavkusa.store/nibitujetejorirogos39.pdfIn PDF document text
    • http://aires.fun/zexusubosax2n1.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/wijipeletuje4ygla.pdfIn PDF document text
    • http://iqecoportal.ru/91479097957raiar.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/82730072184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497081/normal_6012db6a4e7d8.pdfIn PDF document text
    • http://kyrgyztours.com/template_archicad_22_brasildxf04.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://245ae9ba-e923-43ed-bc11-30ed5d1acd78.filesusr.com/ugd/051519_47bf48c84b0845e1bad25cd028fcf270.pdf?index=trueIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_ee73d1ea0377412c991d729ffe295354.pdf?index=trueIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_b82216b533ff426c9c8f8b8f15e18158.pdf?index=trueIn PDF document text
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_64852dbaeef1456a9860f3fd79494ec5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A8 4828 bytes
SHA-256: a125b84a665aeddff7a410b3b79c7ed2dc8c3b4017e261f4bb21832f16c1cd77
font_01_sfnt_off0000f81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81E 11320 bytes
SHA-256: 8155b0b4556c27c1506d85a150194aa9fd9fdf6e9dddd035d65e7000629b7474
font_02_sfnt_off00011ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAD 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3