Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f710a91d8093435…

MALICIOUS

PDF

73.0 KB Created: 2021-03-29 10:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c6ec9fadac7fdd94e1c0cadb7a9209f4 SHA-1: 767b19585396b18bf9070c55a1cc54ec17d3864b SHA-256: 6f710a91d80934352011ac1d8fcab9e158c85a292c30424ab0714db90330ed4e
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with a primary focus on directing users to `https://resalured.ru/strik?utm_term=dsp+first+second+edition+solutions`. The document body, though heavily obfuscated, contains text fragments that align with a lure for 'Dsp first second edition solutions', suggesting a phishing or scam attempt. No scripts were extracted, but the presence of external URIs and link farm characteristics points to a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=dsp+first+second+edition+solutions PDF link annotation
    • http://dikoxikikalonib.scienceontheweb.net/double_basin_tidal_power_plant.pdfIn PDF document text
    • http://just-gopro.com/xelojl5dzd.pdfIn PDF document text
    • http://lafovawolifi.22web.org/vixagasiraxaf.pdfIn PDF document text
    • https://xaredeni.weebly.com/uploads/1/3/1/8/131871979/1cd2a8ce.pdfIn PDF document text
    • http://zefefiwova.medianewsonline.com/ferikosakanutezu.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://gozexorajive.weebly.com/uploads/1/3/4/6/134610068/5142960.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/april_month_current_affairs_2020_in_tamil.pdfIn PDF document text
    • http://euroshopmn.space/bitcoin_miner_android_v1._02zdfy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giserokusifuzi.epizy.com/low_income_subsidy_income_guidelines_2018.pdfIn PDF document text
    • http://zizematav.epizy.com/damulezenuwaxixozo.pdfIn PDF document text
    • http://pafapijeneradab.rf.gd/sanguine_paradise_beat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ba0cd4-56fe-4fd1-807f-259153ddf2fc/gokubejapur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0346c75-2177-44c5-8f2d-4aee93599cac/98776538622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6677bd9e-daf3-4b0f-adc0-d4e06bf096a8/the_game_of_thrones_story_summary.pdfIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/what_education_is_needed_to_be_a_child_psychologist.pdfIn PDF document text
    • http://pajogapusifured.rf.gd/character_reference_letter_for_court_template.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_off0000ddf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF4 4936 bytes
SHA-256: 15a109cafe517b7d447dd02797c281339a7c6f5f3b7e2f0658c82fd1dc0e5cd7
font_01_sfnt_off0000eedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDB 11404 bytes
SHA-256: de526e549b4b55f6b130986979fc468f91db3511d0d235be68646e3361326bdc

Open this report in the interactive analyzer, or submit your own file for analysis.