Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f63aba9e8b9f70…

MALICIOUS

PDF

77.4 KB Created: 2021-03-18 18:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ad4716e7586d39cebaddc47d6019494a SHA-1: 526a1edb4c7301f3cdf84f39d7901ec7a0241a41 SHA-256: 17f63aba9e8b9f707debf2c9f02c0532520409bef7ef6aa2202428b921a4b6cb
206 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, including ClamAV's Pdf.Phishing.Trojan-d2568dad23a94d95 signature. It functions as a link farm, presenting numerous external URLs, likely for phishing or scam purposes, with one prominent URL being 'https://resalured.ru/strik?utm_term=can+i+renew+my+license+online+ohio'. The document's structure and embedded links suggest an attempt to direct users to potentially malicious websites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=can+i+renew+my+license+online+ohio PDF link annotation
    • https://cdn.sqhk.co/gapalagabig/ESidVjb/23281924176.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/jgUhIgc/jadenemavanupuzopud.pdfIn PDF document text
    • https://cdn.sqhk.co/pulizojiwim/5Jgeifa/46570825489.pdfIn PDF document text
    • http://mon-cmso.best/dr_malachi_z_york_bookstoreuutpt.pdfIn PDF document text
    • http://pobegikobej.iblogger.org/brighton_and_hove_council_housing_application_form.pdfIn PDF document text
    • https://cdn.sqhk.co/dudavizi/hgAhbSl/solution_escape_game_50_rooms_2_level_28.pdfIn PDF document text
    • http://teagreen.space/beautiful_vim_cheat_sheetfdw4m.pdfIn PDF document text
    • http://goodsun.space/minunuwunaludegoxuxubamef0r42r.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/highchb/dinosaur_race_car_set.pdfIn PDF document text
    • http://promoocaoameericanas.com/business_plan_software_full_version_freewgkyv.pdfIn PDF document text
    • http://funofuzifige.iblogger.org/friendly_letter_template_4th_grade.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/05f3913c-c1c6-4384-866d-9abaed86f1d0/36581985579.pdfIn PDF document text
    • http://rorewoj.rf.gd/tejidomifa.pdfIn PDF document text
    • http://juwemijawikipo.epizy.com/english_verbs_in_telugu_meaning.pdfIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_bbc0914021aa4c6ebcb05c9c8ddf8176.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d80a2ab6-c94f-446a-ae43-d0bd41ca7b44/black_amp_decker_trimmer_string_replacement_battery_powered.pdfIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_ec2f2e101c8f4bf1991c4eb2518dd065.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7edb9714-c0e2-45f9-bfc3-04d1bbf6cf6a/relion_micro_walmart_blood_glucose_meter.pdfIn PDF document text
    • http://paxaxebox.epizy.com/learning_arabic_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2cce732-07a8-45fe-8d55-2c176dd6e425/line_6_spider_jam_75_watt_guitar_amplifier.pdfIn PDF document text
    • http://webubekesivamuf.epizy.com/vudilasopafamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b14c0549-550a-46cc-9f76-3233d84681c8/crochet_patterns_for_baby_blankets_with_animals.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_off0000efc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC7 5140 bytes
SHA-256: 326e767530035227f41844b93b9b33c5787cdfbd77d0008f82a0ad4995a2d443
font_01_sfnt_off00010127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10127 10960 bytes
SHA-256: 1cd725318e6e70a050b6183560d6399c069585ad6fbbdaf69e72a6b4349f82d8