Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f287ce2b859966…

MALICIOUS

PDF

75.5 KB Created: 2021-03-07 21:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d5c5c2ad325db576576aee40d9022ee3 SHA-1: 14b826963d654d1c959ea3851160e68bb042ec89 SHA-256: f2f287ce2b859966bdb38c8bd7df8b8524ae8ea5ee44aaa1da248788bb8861ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://golowaki.ru/aws?utm_term=bow+tie+movie+theater+hoboken+nj PDF link annotation
    • http://whysmall.space/harris_matchless_g80_performance6arou.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/what_type_of_poem_is_remains.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/what_is_the_symbolism_of_ravens.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/le_petit_prince_movie_songs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_5fd7965239c24.pdfIn PDF document text
    • http://takefeduw.iblogger.org/bukuronanalebowuwoxasevob.pdfIn PDF document text
    • http://gukabibus.mygamesonline.org/fikinafokafufato.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408177/normal_5fcd2099a8c3d.pdfIn PDF document text
    • http://mihetos.xyz/31770306429kure9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416790/normal_5fd0ee761a5be.pdfIn PDF document text
    • http://jogegeve.22web.org/firmware_cho_android_tv_box_x96_mini.pdfIn PDF document text
    • http://bobimesufapi.iblogger.org/java_convert_inputstream_to_file.pdfIn PDF document text
    • http://hook-up.fun/40431600735pb0l5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://birabigipo.epizy.com/lasaduraguwevifiro.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/biochemistry_online_book.pdfIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/88891512348.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/maradona_malayalam_song_free.pdfIn PDF document text
    • http://bajekixizosi.myartsonline.com/what_is_a_feature_story_in_agile.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_off0000eab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB7 5196 bytes
SHA-256: 4ad34c4fc1382fb3ed2cdf5a0bf88a9b0f5b55f73ef360c97c005e56f07c8d7a
font_01_sfnt_off0000fc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC53 10864 bytes
SHA-256: f8d5f52797207f2b40e8414c104b0f532e0d4b2e18160f8a1a405f240d5b4b6b