Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da3691191d15012…

MALICIOUS

PDF

84.5 KB Created: 2021-03-12 03:19:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0fca9aba4f6dfc009f073369c17277a8 SHA-1: 5b696ed8692df2ea9df188387cae1fa2720cd957 SHA-256: 8da3691191d15012ea496f3caa483e4f1c44fba02244f3a8475a270cb914de48
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The presence of 'utm_term' parameters suggests tracking or redirection for malicious purposes. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

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
  • 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://xezojetit.ru/strik?utm_term=jason+capital+social+media+boss+reddit PDF link annotation
    • https://cdn.sqhk.co/ruvuwoki/djciehc/dokemupidezoles.pdfIn PDF document text
    • https://mitenipup.weebly.com/uploads/1/3/4/3/134363071/140495.pdfIn PDF document text
    • https://zowobisa.weebly.com/uploads/1/3/5/3/135313501/6396202.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/ibgjJgg/wood_cutting_boards_amazon.pdfIn PDF document text
    • http://supexevibune.22web.org/furunabubumexipudobivud.pdfIn PDF document text
    • https://cdn.sqhk.co/berazanoga/viakjiJ/rotilevadokaxa.pdfIn PDF document text
    • http://golosa-spasibo.ru/guwalaxarikivapajibala59.pdfIn PDF document text
    • https://xeraxoxatetubus.weebly.com/uploads/1/3/5/9/135993523/245c8962b.pdfIn PDF document text
    • https://pelabomorifij.weebly.com/uploads/1/3/4/6/134628360/basuxow.pdfIn PDF document text
    • http://lightstart.xyz/70543078262ojk1.pdfIn PDF document text
    • http://mastericy-chistoty.ru/how_to_date_someone_with_a_girlfriendxxcjt.pdfIn PDF document text
    • http://lastmarkt.ru/vimidirenaduxulijiwusodas1mmo4.pdfIn PDF document text
    • http://josibazuveloj.iblogger.org/32857402837.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/98e9a9df-9fbc-411f-a1d2-5c565eb70b74/briggs_and_stratton_725_series_ex_190cc.pdfIn PDF document text
    • https://e33362eb-94ba-4427-a888-6f4863169a18.filesusr.com/ugd/36ce96_2c51be7104d649a99a7c32312b04d090.pdf?index=trueIn PDF document text
    • http://kifagugurubox.rf.gd/xumitipepixixe.pdfIn PDF document text
    • http://jaziwosud.rf.gd/47988252563.pdfIn PDF document text
    • http://petobesafena.rf.gd/epdm_insulation_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b874ecdc-6c0f-4e85-b635-13f8fae4dc18/86469453423.pdfIn PDF document text
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_69d1a48c6f904f3bbc64169a7f5b1f71.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dead2306-dcaa-4001-8553-9a3288bb9477/33651213441.pdfIn PDF document text
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_2bf03899c96d4d8e8b4c6fb4660ab212.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3793e14-0d35-4233-9298-b0b3bbb9c6c8/nonutezono.pdfIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_144fe8d3ba6a4325bd6940b29e4c9410.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_off00010146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10146 5136 bytes
SHA-256: 9a24404c107ab898331a1dc14efc8084c46bddf3474a05e5a2107112ceac6863
font_01_sfnt_off00011287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11287 10320 bytes
SHA-256: 444c03ee46947f14161738b08ba83e1d84bfb1632a84b63b52f95f678a13cb56
font_02_sfnt_off000135f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361