Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d189926939e945a…

MALICIOUS

PDF

72.0 KB Created: 2021-03-26 17:39:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f03f0b030d82915eb9bd863404fba543 SHA-1: 72e5ee18360ac17bf0759c27642df76e17e3464d SHA-256: 5d189926939e945a1a6b80cff860ee6bdf8ecb39e60c7ab595b5bca3aefa877d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and the 'link farm' heuristic point towards an attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://maypoin.ru/123?utm_term=block+story+4.+1+1
    • https://cdn-cms.f-static.net/uploads/4449419/normal_6029c9dabbaf2.pdf
    • http://kelnoteres.xyz/sap_crystal_reports_2016_tutorial4gums.pdf
    • http://migerov.xyz/84386881078rnnvb.pdf
    • http://gonzo-3d.com/danonevamugirinepekzo983.pdf
    • http://5coupon.info/20831670104m26lr.pdf
    • https://cdn-cms.f-static.net/uploads/4490524/normal_60414e61e7e42.pdf
    • http://lezapogogaz.iblogger.org/xawinewitubazuruzerimexat.pdf
    • http://prosale.company/baby_bjorn_travel_crib_recall5yuhq.pdf
    • https://cdn-cms.f-static.net/uploads/4482413/normal_601e4f9c57221.pdf
    • https://cdn-cms.f-static.net/uploads/4410986/normal_60469d50abb8f.pdf
    • http://zaliv2k20wowowowoow.xyz/fl_studio_11_full_crackpvibc.pdf
    • http://testersairf.xyz/questions_based_on_vsepr_theory_class_1174o7l.pdf
    • https://cdn.sqhk.co/jesisuvov/fY1egg3/bloodsport_movie_quotes.pdf
    • https://cdn-cms.f-static.net/uploads/4377938/normal_604e59e199621.pdf
    • https://cdn.sqhk.co/vixukose/fXD3jaU/ire_blood_memory_hack_apk.pdf
    • http://ru-1.casa/html_template_tag_attributesfncqs.pdf
    • http://hd-cam-mirror-up1.club/will_there_be_a_book_after_crooked_kingdom4armk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pepuzigupa.epizy.com/wugerog.pdf
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_7ca2071d91034ef8b57f44b17685ab94.pdf?index=true
    • http://pasobopupolom.rf.gd/how_to_exercise_at_home_without_equipment_to_lose_weight.pdf
    • http://jijupebibinuwib.rf.gd/gawaziweguxipuveg.pdf
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_6ca40d78097c4f6fa26d981f946983eb.pdf?index=true
    • http://wepaxilex.epizy.com/19176445666.pdf
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_03f0edbb8a8145caaa38579a3b9ab306.pdf?index=true
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_b369e9966fc74695aa0d541a5fe68a2f.pdf?index=true
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_69de088bcb8f4907a717a3b79d7ac511.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd48.bin
147fda66f788ad5dbdd4bcee5a8d90e4214b87d3bc6997cdca9e92eaf9dfc759		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD48 4968 bytes
font_01_sfnt_off0000ee63.bin
a9ef3353aabcb6a808c4c9c51aee8a33015981b6c5fd66ecb4ba2b3fae3090f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 10892 bytes

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