Malicious PDF — malware analysis report

Static analysis result for SHA-256 312481f7701e4c4a…

MALICIOUS

PDF

91.0 KB Created: 2021-02-12 03:30:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3fc8c6562e2e739a1510fd54425ff8b9 SHA-1: f70216a3e87e3ec26be0c5cfebafb30939029ca3 SHA-256: 312481f7701e4c4a1a960aba005e370595bb37f3bd704efa01a51a16cc089d80
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'download' button heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/wix?keyword=archos+video+player+apk+mod PDF link annotation
    • https://cdn.sqhk.co/kefexunas/hgjiDig/jungle_jump_adventure.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/RXFtczb/basketball_game_score_now.pdfIn PDF document text
    • http://detonic-hypertonie.website/zodorakunewejf86vy.pdfIn PDF document text
    • http://milesnires.xyz/jafudoxejewonolikavepozuukggz.pdfIn PDF document text
    • http://bet-info.ru/viwuseronomigozabonep0gg8.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/gihjjif/8452662180.pdfIn PDF document text
    • http://topsol.xyz/73098719617twi08.pdfIn PDF document text
    • http://alcozerox.com/game_night_invitation9q9z9.pdfIn PDF document text
    • https://cdn.sqhk.co/kokademesuz/jbRriis/zunejafil.pdfIn PDF document text
    • https://cdn.sqhk.co/wavefekus/hharzid/38468569307.pdfIn PDF document text
    • https://cdn.sqhk.co/dizoketa/jcUdiie/kovigedumolawimixesuleki.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/MEsggjd/59121218585.pdfIn PDF document text
    • http://alisabor.design/swagbucks_android_app_hackxxmnh.pdfIn PDF document text
    • http://klyshsheff.xyz/power_music_workout_mp3_downloadtk97k.pdfIn PDF document text
    • http://albatros-trans.ru/11720034344p7s10.pdfIn PDF document text
    • http://yesstore.pro/53631486771fwswh.pdfIn PDF document text
    • https://cdn.sqhk.co/dunafafaxen/tghuYIz/gevelifagajuw.pdfIn PDF document text
    • http://morpeoplelife.ru/car_vin_number_free_reportzveca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012d83.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12D83 27796 bytes
SHA-256: 712d3ab46d34f79f92ec980051c52de0905deaa933fd47466320804c0c7ea348
font_00_sfnt_off0000f660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF660 5528 bytes
SHA-256: e9fcdb87b37659d08235e4435eca22e42dda60f0134fe5fb90c64c84d1b9d2d4
font_01_sfnt_off0001090f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090F 10592 bytes
SHA-256: f5bf6cb7e230f79b7cf5c7a947412ef9fbc390fcf2419f660f3fa70e840f02ef

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