Malicious PDF — malware analysis report

Static analysis result for SHA-256 807513a38d5dcb7d…

MALICIOUS

PDF

82.3 KB Created: 2021-01-18 12:20:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 65fdf450217f53be8955ac8dd4454e60 SHA-1: 17ed70940011d1afe49c74da557533ad81765c6f SHA-256: 807513a38d5dcb7d8f0a5e6bcc7de4b82553d209150f444118ce0a818b53e14b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://jacksth.ru/123?utm_term=sin+ti+letra+eladio+carrion PDF link annotation
    • https://site-1176609.mozfiles.com/files/1176609/littlest_pet_shop_420.pdfIn PDF document text
    • https://site-1174481.mozfiles.com/files/1174481/miso_full_form_in_microcontroller.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/besejisuwetilow.pdfIn PDF document text
    • https://site-1166597.mozfiles.com/files/1166597/37025724644.pdfIn PDF document text
    • https://site-1176776.mozfiles.com/files/1176776/jet_ski_boat_race_game.pdfIn PDF document text
    • https://site-1192291.mozfiles.com/files/1192291/smashy_road_arena_hack_apk_2020.pdfIn PDF document text
    • https://kuginipa.weebly.com/uploads/1/3/4/8/134853520/4939780.pdfIn PDF document text
    • http://zupedaganivo.66ghz.com/plural_form_of_alumni.pdfIn PDF document text
    • https://bodupojuribun.weebly.com/uploads/1/3/4/7/134758420/7615334.pdfIn PDF document text
    • https://tavekudu.weebly.com/uploads/1/3/4/6/134631894/2060931.pdfIn PDF document text
    • https://site-1174360.mozfiles.com/files/1174360/street_fighter_movie_blanka_transformation.pdfIn PDF document text
    • https://site-1083772.mozfiles.com/files/1083772/my_ice_hockey_girl_chinese_drama.pdfIn PDF document text
    • https://site-1178066.mozfiles.com/files/1178066/1108922967.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fopalew/16291446507.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/legukofanegedenujisixava.pdfIn PDF document text
    • http://sovizaz.epizy.com/paxotakotok.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/escape_plan_2_putlocker9.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/camera_fv_5_lite_pro_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/broadway_ts_regular_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/free_complaint_form_template_word.pdfIn PDF document text
    • http://webidiwotew.epizy.com/18793567900.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD88 4856 bytes
SHA-256: 45c5d8616665720ef79eb6ff7d16754a852d2b2dd97c98f59f9225c7940d9031
font_01_sfnt_off0000ee0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 3956 bytes
SHA-256: 8ebcd6aa0ecf171f505dff20da1ddd71af3c35d1ee0dbbf09f23542a6522c0b7
font_02_sfnt_off0000fc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC52 12000 bytes
SHA-256: adbf733479e119e8258d94273e11cd0a34213cbd5f7a23c4f0e49a8a2dddc006
font_03_sfnt_off000123d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D2 16248 bytes
SHA-256: 286264fe2a91e2897711c023a885546aff74ea71b9cc3829a4c7e4e959703c46

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