Malicious PDF — malware analysis report

Static analysis result for SHA-256 a620fcc68be84d38…

MALICIOUS

PDF

102.0 KB Created: 2021-03-18 23:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 118bd8bc636881b4569047af8d8d8561 SHA-1: 41c5ff4e5f3087b24086874176116b093363add5 SHA-256: a620fcc68be84d38e261eb88847e76316c11098347162dc67d3d3179ff788247
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to drive traffic. The primary lure appears to be related to 'Mortal Kombat X Android Mod APK Online', suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

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 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://druttle.ru/wix?keyword=mortal+kombat+x+android+mod+apk+online PDF link annotation
    • https://jiwujidevidu.weebly.com/uploads/1/3/0/8/130874067/naxagos.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/brgcVMf/gesig.pdfIn PDF document text
    • http://ginupedarokuxu.getenjoyment.net/gogasezixogotaluvutek.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/dgcA1oZ/45190499505.pdfIn PDF document text
    • https://mutakisutuw.weebly.com/uploads/1/3/4/7/134768563/gitojo-sezusera-toliwagolo-kivaxitupexepum.pdfIn PDF document text
    • https://wufodosutitivo.weebly.com/uploads/1/3/0/7/130739718/kexef-relidowa-ruviwoxuz-dowolaritakuf.pdfIn PDF document text
    • http://bukipumil.mypressonline.com/39644123296.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/bhhgbij/rezaguwenenilevuletega.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed842b21-8277-4a67-b54c-ed8b70a28960/lolomulet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd968567-d696-4874-857a-4c6d27344e80/how_to_read_music_notes_for_beginners_trumpet.pdfIn PDF document text
    • http://fegoluvarelewum.myartsonline.com/mn_drivers_license_practice_test.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/55236494536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d72f2ee2-e268-45fa-a3ee-336c51b0f2b4/oxford_dictionary_english_to_tamil_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb33816c-2244-41f7-be4f-870295305e81/triton_atmosphere_features.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1739485b-6ea3-4a42-884b-0d4e5ffce8ce/73730580549.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/nujawejopalizadamidozexe.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/state_employees_credit_union_near_me_now.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://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_off00014fd7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14FD7 32444 bytes
SHA-256: af3f72ee689137e91bd9d925173653fcc6b0efacd655edb47e965e4bde8e2a27
font_00_sfnt_off000118c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C5 5204 bytes
SHA-256: 228672e5a21ab45f3d093e45a9f8e4f2aba88804c6a32b96d10bc5baf51ba659
font_01_sfnt_off00012a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A63 10864 bytes
SHA-256: 89980169ac90b1d8bcad7fea6a788bf5e9b4ae85671a2809b6a7478a0f623c1f