Malicious PDF — malware analysis report

Static analysis result for SHA-256 88003a1fca88cb73…

MALICIOUS

PDF

84.2 KB Created: 2021-03-24 21:23:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 04f924733bfa96f8c029374029753150 SHA-1: ee0a5265b0623edd7c8cf6170dfa37daeaf20dbf SHA-256: 88003a1fca88cb732fae8e8d9902157902af6e9ec2c8e6b415fa9a8534873ad1
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags the document as a link farm on disposable hosting, reinforcing the phishing/malware lure pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://fokemale.ru/123?utm_term=forma+sint%25C3%25A9tico+e+anal%25C3%25ADtico PDF link annotation
    • http://fisitupogavi.mypressonline.com/85547682660.pdfIn PDF document text
    • http://dvestideyli.xyz/exercice_sur_le_calendrier_ce2nayo3.pdfIn PDF document text
    • http://saripituxupagek.sportsontheweb.net/product_game_board.pdfIn PDF document text
    • http://usene.xyz/bikram_singha_bengali_hd_movieim7mx.pdfIn PDF document text
    • http://nutopul.22web.org/wells_fargo_dealer_services_payoff_information.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/livebitimagetexinomojusek.pdfIn PDF document text
    • http://fkpravo.ru/22892384785fbabf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445128/normal_6002622e6fcd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476595/normal_5fc6ced582fb1.pdfIn PDF document text
    • http://universe1.space/28972440897wb2q5.pdfIn PDF document text
    • http://dajobod.getenjoyment.net/botafomilu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443619/normal_5fe5088ea626a.pdfIn PDF document text
    • http://changely.club/79363647356e97uu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5ffbaea8419cd.pdfIn PDF document text
    • http://revershjtb.site/101_christmas_songs_albumui9a6.pdfIn PDF document text
    • http://opensoda.pro/difficult_word_search_appg9siu.pdfIn PDF document text
    • http://damisidituwupo.iblogger.org/zasileraso.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://ludodugadigepez.rf.gd/tusowefisapezimadulodox.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/cost_of_rosetta_stone_app.pdfIn PDF document text
    • http://kogawazer.epizy.com/como_limpiar_los_zapatos_de_cuero_por_dentro.pdfIn PDF document text
    • http://gufesabil.rf.gd/79507141954.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/82536289224.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/angular_7_formarray_example.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/lisotupidakafipim.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_off0000fc2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2B 4884 bytes
SHA-256: 2ce8f22c3006be569380e1da23e1a0b20a62c52163508fd0fbe4dc91fb814bcd
font_01_sfnt_off00010c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4C 11932 bytes
SHA-256: e8daefad862ec26726be49cb004c12f3282cc2fb05c484b020b81e7a8c34b0a1
font_02_sfnt_off00013351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13351 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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