Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0f674da69a37ff…

MALICIOUS

PDF

83.8 KB Created: 2021-03-07 11:29:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ae9d37f795a92b4653d6a5a23b25e951 SHA-1: 2126e6d6a4ab377fb509442bb3d1c1db44218b79 SHA-256: 5e0f674da69a37ffba87fa049ffeffc53d0942d28e38decddd30e0423d0f832b
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, many of which are configured to redirect users to external sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely a phishing or redirection campaign. The presence of external URIs and a link farm on disposable hosting suggests an attempt to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jacksth.ru/strik?utm_term=what+is+code+12+on+rinnai+tankless+water+heater PDF link annotation
    • http://dipazekonowa.mypressonline.com/13922739251.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/britax_marathon_weight_limit_latch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370068/normal_6008ce07d324f.pdfIn PDF document text
    • http://lafilubepojev.scienceontheweb.net/how_much_oil_goes_in_troy_bilt_snow_blower.pdfIn PDF document text
    • http://rutabeno.22web.org/sukavapajuxifimewebo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383138/normal_5fe13c20c31c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491414/normal_600aac560c987.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380226/normal_5ff14c0d275af.pdfIn PDF document text
    • http://wubujonil.getenjoyment.net/bomigakixu.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
    • http://xetitonaj.rf.gd/blockbuster_telugu_dj_songs_free.pdfIn PDF document text
    • http://gunuguduwurenog.epizy.com/37479200931.pdfIn PDF document text
    • http://vakifopifin.rf.gd/curriculum_guide_in_filipino_august_2016.pdfIn PDF document text
    • http://mogopubu.epizy.com/infrastructure_as_code_github.pdfIn PDF document text
    • http://wozaxanakix.epizy.com/xigigufudaweruxub.pdfIn PDF document text
    • http://vufavaxotajoba.epizy.com/nowij.pdfIn PDF document text
    • http://davinawoguzag.atwebpages.com/bikusew.pdfIn PDF document text
    • http://jeleributuwata.epizy.com/zorofamufumujumevexowaxu.pdfIn PDF document text
    • http://gitipezusev.rf.gd/sidazebeteveperifinikuse.pdfIn PDF document text
    • http://sonowodiguvab.epizy.com/before_i_wake_movie_in_tamil.pdfIn PDF document text
    • http://tipipigi.atwebpages.com/34892700428.pdfIn PDF document text
    • http://xufeguwopox.rf.gd/bowflex_pr1000_review_reddit.pdfIn PDF document text
    • http://lafagelupuf.myartsonline.com/7990569900.pdfIn PDF document text
    • http://boxijekew.atwebpages.com/14490414075.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2E 5168 bytes
SHA-256: 3486f46bd5f757a03bd49e562615edceb3a4087f20a6c167e2738dd79916b22a
font_01_sfnt_off00010fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC1 10360 bytes
SHA-256: 8270b5ceefbcb5777acb9dfbe85654a205382e06e07b72ec078ad6cca6f85f59
font_02_sfnt_off00013347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13347 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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