Malicious PDF — malware analysis report

Static analysis result for SHA-256 400293faac088e77…

MALICIOUS

PDF

78.6 KB Created: 2021-03-06 00:06:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: abbb871157748209d31cca018146e075 SHA-1: e92d11f643ad70330d228c0f367ac1dd8acb2b85 SHA-256: 400293faac088e77b9564bcaeb1e555917d487f3042f80e8fee4118df3cba500
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicative of a link farm designed to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to compromised or malicious web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/wix?keyword=smashy+road+mod+apk+1.4.0 PDF link annotation
    • http://casser.xyz/libro_de_historia_universal_contemporanea_sexto_semestreahkf6.pdfIn PDF document text
    • https://vosanodamenero.weebly.com/uploads/1/3/1/4/131438282/mopiwe.pdfIn PDF document text
    • http://zesamoa.online/10828860579qrwfm.pdfIn PDF document text
    • https://pemilixip.weebly.com/uploads/1/3/5/3/135330450/zuwixa.pdfIn PDF document text
    • http://gloslides.com/10805240498npfpq.pdfIn PDF document text
    • https://jirakeleda.weebly.com/uploads/1/3/5/9/135992973/6774868.pdfIn PDF document text
    • https://dasukixarukawo.weebly.com/uploads/1/3/2/8/132814138/fikufofuzafipet-wutikeledadiviv.pdfIn PDF document text
    • https://befuvabesuwab.weebly.com/uploads/1/3/0/7/130740391/mavil_wofuxokefema_tolajujelu_setotamoza.pdfIn PDF document text
    • https://pikotawikeju.weebly.com/uploads/1/3/4/4/134496208/6735959.pdfIn PDF document text
    • https://mijonuguvozu.weebly.com/uploads/1/3/1/8/131871478/413181d.pdfIn PDF document text
    • https://surevasod.weebly.com/uploads/1/3/1/8/131856145/f636b2924a52c.pdfIn PDF document text
    • https://pobunusegem.weebly.com/uploads/1/3/4/4/134460984/tisibakuvapunodasuv.pdfIn PDF document text
    • https://naxozafo.weebly.com/uploads/1/3/1/4/131483391/waveluwatafok.pdfIn PDF document text
    • http://mx50off.info/17497098921f60ut.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://uploads.strikinglycdn.com/files/ce44e0bc-eb4b-459d-a6f6-aa40dfc888b6/23809218449.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/aequor_information_technologies_zauba.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/believe_in_me_2006_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/54848215740.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/hypertensive_emergency_guidelines_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae35a2f8-396d-48b7-8089-b56a9df30958/black_and_decker_cordless_hammer_drill_20v.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a8ed2f-c95f-4e63-a76b-bcc3080bb709/zevovifirinejubokinusaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc246f6-41e2-4c19-89d8-950f0d09bfab/database_management_systems_3ed_r._ramakrishnan_and_j._gehrke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a8462d-9a80-4af6-9254-ea68ceb42321/dizewojakamipenepu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92B 5184 bytes
SHA-256: aefbec1e2328d0b79ad4034b9276cd43cee072bf90a18e2120f9bff95bbe6010
font_01_sfnt_off0000fac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC6 10672 bytes
SHA-256: 394cf2d104a9dfd2e86d3f14c2a202db1118e1a3c774a634dfb555dcea757445
font_02_sfnt_off00011f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F11 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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