Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eed996b3bb74f63…

MALICIOUS

PDF

74.7 KB Created: 2021-03-01 02:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7c389f6c4e57650571169ec95822a52c SHA-1: 08a48a8f2f67623fc30a634833a9615cb6da4459 SHA-256: 8eed996b3bb74f639bb6e26ff1437a570ca9e6b9a3ae5a7b3049c929154d6980
186 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, and contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to a 'Kenmore 6 slice convection toaster oven manual'. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a deliberate attempt to manipulate search engine results or direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://kuzutuzo.ru/wix?keyword=kenmore+6+slice+convection+toaster+oven+manual PDF link annotation
    • https://cdn.sqhk.co/libibajuzumu/tjg1Gai/spill_out_meaning_in_tagalog.pdfIn PDF document text
    • http://tobalalupuvobiv.iblogger.org/how_to_fix_conair_hair_clippers.pdfIn PDF document text
    • https://puxezemugip.weebly.com/uploads/1/3/4/3/134311794/nezowiwitokuxod.pdfIn PDF document text
    • https://cdn.sqhk.co/kosibowo/iggPWCT/77753895407.pdfIn PDF document text
    • https://taxupati.weebly.com/uploads/1/3/4/8/134891344/resaba.pdfIn PDF document text
    • https://fikazimibugexu.weebly.com/uploads/1/3/4/5/134515259/konejidi.pdfIn PDF document text
    • https://bipovubukixepev.weebly.com/uploads/1/3/2/7/132740720/tugusu.pdfIn PDF document text
    • https://warubexe.weebly.com/uploads/1/3/4/6/134647576/xudekavakus.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/jdhi9ha/tiktok_banjo_song_slowed_down.pdfIn PDF document text
    • https://novomuzedideb.weebly.com/uploads/1/3/1/4/131406537/nikera.pdfIn PDF document text
    • https://kujibolivobukib.weebly.com/uploads/1/3/1/1/131163991/saseradizuv-tovumiwizigo-bogifozuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/JPjgehi/my_talking_pet_videos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laburebimefifal.epizy.com/bengali_word_typing_software.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/critical_role_character_sheets.pdfIn PDF document text
    • http://forofadikov.rf.gd/bobby_east_spaceship_song.pdfIn PDF document text
    • http://kodexogezetegir.epizy.com/basifoganumedunewadodu.pdfIn PDF document text
    • http://bumojito.rf.gd/where_can_i_donate_mens_dress_clothes.pdfIn PDF document text
    • http://baduwujik.rf.gd/83063807964.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_off0000e80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80A 5128 bytes
SHA-256: 177095572200279c9111b172148edf88d2f328771736c4c63e5ed7142e731cd7
font_01_sfnt_off0000f973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF973 10412 bytes
SHA-256: a107b5a915eb504063da282e61078f794a24e72c3faa5892fd6d79683ddef384

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