Malicious PDF — malware analysis report

Static analysis result for SHA-256 a811e81617953e89…

MALICIOUS

PDF

75.2 KB Created: 2021-03-14 04:00:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8772d027e7dc33c54a4d41b9e840c9aa SHA-1: c7d065b46a1d81303ed949ff18835e50fb250e55 SHA-256: a811e81617953e89a0142dd22368622feddf4940ffe6080542991547b5946b51
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, with a high ML score and ClamAV detection as Pdf.Phishing.Trojan. The embedded URL points to a domain that appears to be part of a phishing or scam campaign, disguised as a product parts list. No scripts were extracted, but the PDF structure and URL suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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/strik?utm_term=lazy+boy+electric+recliner+parts+list PDF link annotation
    • http://vitolebizojigok.22web.org/73179601372.pdfIn PDF document text
    • http://liwugukikijosi.iblogger.org/nawixejobeteluviromu.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirijobadi/df7vZg0/85202449833.pdfIn PDF document text
    • https://kijujiwovijuk.weebly.com/uploads/1/3/1/4/131453096/pupexovimubug_vividagabes_murulaxoki_vobes.pdfIn PDF document text
    • https://musokuvezuref.weebly.com/uploads/1/3/1/8/131871850/7618437.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/40386511844.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/3Eg0NrQ/learn_thai_language_app_free.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/taylor_ice_cream_machine_manual_c723.pdfIn PDF document text
    • https://cdn.sqhk.co/mipekakiri/HXYmghm/68400188391.pdfIn PDF document text
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/wegerog.pdfIn PDF document text
    • https://fububekamuko.weebly.com/uploads/1/3/3/9/133986391/1d6721b4b8.pdfIn PDF document text
    • http://pelabinowoguk.getenjoyment.net/les_adjectifs_possessifs_exercices_a1.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/7d98861e-d9d8-43d6-abf9-bbebb4f0d1f7/ink_for_hewlett_packard_4500.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/mechanics_of_materials_3rd_edition_solutions_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ef8c97-b60e-4a05-b1f1-a0668a5c3e79/wedivimuseniwevugide.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/makisakafa.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/aashiqui_2_video_songs_free_hd.pdfIn PDF document text
    • http://laletanegimiw.epizy.com/foxit_reader_9._4_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0327e255-fb22-4df7-a7d3-8b4b7f863a6c/luwifagob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ba2e81-8d01-417e-8fe6-97326be69150/kawumig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b976b34-97ab-4656-a720-5d922190ed27/susonupipipuxanuvarikas.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/nelagowixavebiposixa.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/96422447661.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_off0000e6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F6 5160 bytes
SHA-256: 173b2aa275b49c14dd846cac1f88d20962a42c535914ef9d57cab08b4c903a8e
font_01_sfnt_off0000f89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89E 11328 bytes
SHA-256: 9921c7a5ba379f315905501eaacc7212233f49aba0b05469450d896de73201fe

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