Malicious PDF — malware analysis report

Static analysis result for SHA-256 71d4a5c9dd049f4b…

MALICIOUS

PDF

76.1 KB Created: 2021-04-09 02:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cc8ac6b0eb2623719b12aaf7764f3c71 SHA-1: 9f3fc45460b16bee98ca33382899dc38ecb65c36 SHA-256: 71d4a5c9dd049f4b2a33fb324be174b7bd66bf186364ff0af4f6cd33f5cddcba
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains an embedded URI pointing to 'dugedepap.ru', which is likely part of a phishing campaign. The document body, though partially corrupted, contains text related to 'Arkansas driver's permit number', suggesting a lure to trick users into visiting the malicious URL.

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://dugedepap.ru/strik?utm_term=arkansas+driver%2527s+permit+number PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369760/normal_6023d46526abe.pdfIn PDF document text
    • http://nudistoff.club/lefefebulujisipajurixusi0kr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_6022056ac6914.pdfIn PDF document text
    • http://priz24.site/how_to_pencil_shading_techniquesfrzeh.pdfIn PDF document text
    • http://viewcreditscore.info/17497837891xxzx4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5fec96fe2e44c.pdfIn PDF document text
    • http://cupe1.ru/codewords_82_answersunn6d.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/c07bc2d8-c525-4ed2-b7e0-95b9f9164a4a/45350431258.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/dragons_love_tacos_worksheets.pdfIn PDF document text
    • https://2a26c5f8-c4f8-4af8-830b-7e2c9961bd8e.filesusr.com/ugd/2e4362_93e5cb031a21484f8da0d462ee4af178.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/dofipidaridunu.pdfIn PDF document text
    • https://198ac300-f2de-41a8-aaa9-2df0d2bfefbb.filesusr.com/ugd/232b71_85dffe6576074d1b969aecb1369366a7.pdf?index=trueIn PDF document text
    • https://cd753cf5-d90a-4073-9c55-931a76e81761.filesusr.com/ugd/8826df_38d8d0f7cf78453db76c593c42053b2e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/25548433579.pdfIn PDF document text
    • https://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_a059dd787f8e4a6a8e51b58bdacdc9f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/united_distributors_pakistan_limited_annual_report_2010.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_4df6529113a148ddb5babf4538e34a4a.pdf?index=trueIn PDF document text
    • https://6593eeda-10fe-4128-810f-cbbc79f0a4f8.filesusr.com/ugd/c0a4bf_9de81dc2bf3a4d0d8075fb4d94be78da.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/de33f5f0-85cd-4230-a488-b499a438901c/ipega_bluetooth_controller_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f256d5-da9b-4097-aed9-0a0f61c9cefd/what_jobs_can_you_get_with_a_bachelor_degree_in_international_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df3918c9-425d-4bfc-8908-b047f5391f2f/20014931141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d32a82ef-c7d9-4502-b6b9-eec505406c7f/pazesalanototimesazolox.pdfIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_4d655549da724afe8f6bed9e952b7f14.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFB 5360 bytes
SHA-256: aef2cd385705561c70329f443a9b095169925d1dc5d582f4672eb4b55ef8e696
font_01_sfnt_off0000ff24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF24 10508 bytes
SHA-256: a0411f78dae89f5322ef46b0cddea9612141c993f99d840cb20e04404db32bfe