Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c923ebadfb02981…

MALICIOUS

PDF

83.1 KB Created: 2021-02-24 02:30:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6a7ef544edca90718158f3f71b10751d SHA-1: 7b4bde5958c324ae61054f97a72f9aa9cbed2c44 SHA-256: 9c923ebadfb02981dd99ccc302f27bd0cd2a8691873a3e0245e8a2409ec7c10d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and contains numerous external links, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains text related to movie streaming, which is likely a lure. The presence of external URIs and a PDF link farm heuristic indicates the document's primary purpose is to redirect users to malicious sites.

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 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://baarspo.ru/strik?utm_term=me+before+you+streaming+english+version PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4506063/normal_5fcf0cf5beb02.pdfIn PDF document text
    • http://ses-paypal.com/mipifikopaluxazubogufomow57hl.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/ihhe9OV/39553083873.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500208/normal_5fca42d17e015.pdfIn PDF document text
    • https://cdn.sqhk.co/likunubiba/Ygjgchh/dinos_online_unknown_enemy_mod_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380413/normal_5ff4c57ae596e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414498/normal_5fcd300b25f4e.pdfIn PDF document text
    • https://cdn.sqhk.co/xejarirep/j3ieEhe/44992230904.pdfIn PDF document text
    • https://gituwelogasof.weebly.com/uploads/1/3/2/8/132814340/nigasabokebe.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/ztidJYm/97208856327.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/ohehfgf/vehicle_gogo_working_car_railway_crossing_crossing_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/jihheii/word_color_test.pdfIn PDF document text
    • https://cdn.sqhk.co/mutukowure/uL5shd8/black_and_yellow_keyboard.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sugomoriwegisi.epizy.com/29548781987.pdfIn PDF document text
    • http://vixezazemezox.epizy.com/free_airshou_for_iphone.pdfIn PDF document text
    • http://lajonapeloros.rf.gd/wonix.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_off0000f1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F9 3984 bytes
SHA-256: 1805db888644fdc4860da2a213d033e146c2ce6006a83ebddbde4fc4b0b835a6
font_01_sfnt_off0001003c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003C 5488 bytes
SHA-256: ce2706748ca8a3aee476108fe619fcc2055e4d6e59b2036fc68756f71ca2b0ad
font_02_sfnt_off000112d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D8 12928 bytes
SHA-256: fcc57bd96aa7fddd054df4789acaba9a583d90f73f667c8242c65dd01cbf8cce

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