Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62bbd0c1f8ac055…

MALICIOUS

PDF

69.1 KB Created: 2021-03-11 23:01:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 30c0c0caf665faca303cb51420a60c73 SHA-1: f64879f5c11271c8c2d90f724c32caeda77280db SHA-256: f62bbd0c1f8ac055b3a996549078ed49b84d45a24c018a9cb766d5244a6169cd
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 trojan. It contains numerous embedded URLs, including one that redirects to a suspicious domain, likely serving as a lure for users interested in mental health topics. The presence of external URIs and link farm heuristics indicates an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=what+is+a+relapse+prevention+plan+mental+health PDF link annotation
    • https://tuxitusonodedin.weebly.com/uploads/1/3/0/8/130873989/c7133897bec0c9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455669/normal_602906c7cb56f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489440/normal_5fdb59c75040e.pdfIn PDF document text
    • http://birebap.scienceontheweb.net/15988364258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408460/normal_60373aa1888c5.pdfIn PDF document text
    • http://nanamojuvimujo.medianewsonline.com/xamusizeravubarozuxik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494440/normal_6041d75e73f46.pdfIn PDF document text
    • https://wabelurotetef.weebly.com/uploads/1/3/4/6/134693048/fofewefajofo.pdfIn PDF document text
    • http://tikanaw.mypressonline.com/hindu_arabic_numerals_1_1000.pdfIn PDF document text
    • https://rixonusoraj.weebly.com/uploads/1/3/0/7/130738646/noxadema.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/dd_5e_players_handbook_with_bookmarks.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xumuritikoxuk.myartsonline.com/how_many_calories_are_in_a_sonic_cherry_limeade.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/12569955875.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/bavabulegisawamam.pdfIn PDF document text
    • http://xobibaga.myartsonline.com/character_traits_and_the_adventures_of_tom_sawyer_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/how_to_become_a_emt_near_me.pdfIn PDF document text
    • http://mojozore.myartsonline.com/32993424848.pdfIn PDF document text
    • http://rogomore.myartsonline.com/26662678362.pdfIn PDF document text
    • http://timojodabemisux.myartsonline.com/93615190462.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/my_boy_games_free_tekken.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/vamidatude.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/gravely_ztx_42_parts_list.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_off0000d01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01F 5132 bytes
SHA-256: e3aba89bc006b3befec25f0b326c909578189a3b9e45a19002123d9bdcdaca22
font_01_sfnt_off0000e17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17A 10864 bytes
SHA-256: f1b4f8a0505f9830da401d9edaaeb8102a0c12a13de54abf2eedfe8fa68463cd

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