Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee854517f8c5d4e8…

MALICIOUS

PDF

74.6 KB Created: 2021-03-04 11:06:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 49382f186b8591b93d603d29f2e741df SHA-1: 5de3d273ca4f0e89b060294e9e48ae3f3636ec1d SHA-256: ee854517f8c5d4e8df73e504974c1d4bdb732048816903f8116c59f37d2558fd
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to link farms hosted on disposable domains or known redirector infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to lure users to harmful sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=mgma+physician+income In PDF document text
    • https://cdn.sqhk.co/sirepajaku/GHK29jb/66366323950.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475196/normal_5fef6b45b96c2.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/Iid0gc3/vegas_slots_doubledown_casino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411926/normal_5fd326a97124a.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/hihgidp/80s_synth_music_free_download.pdfIn PDF document text
    • https://bagibobujinokat.weebly.com/uploads/1/3/5/3/135312275/guzibe_waruw_xejavojal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495846/normal_5fcd638e4973c.pdfIn PDF document text
    • https://cdn.sqhk.co/jefigujaxev/gikivgj/cut_paste_photo_seamless_edit_for_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390097/normal_5fcb1141a2c8f.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/jjjaJgi/41116309698.pdfIn PDF document text
    • https://kivalake.weebly.com/uploads/1/3/4/8/134885121/bagarosine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485822/normal_5fdc8605ad339.pdfIn PDF document text
    • https://davovexo.weebly.com/uploads/1/3/4/3/134355956/aad68fdc25e39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_60131a8a9b3b1.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/8DFJgj4/mekorama_all_levels_unlocked.pdfIn PDF document text
    • https://tulelamesesixe.weebly.com/uploads/1/3/5/3/135321102/b8ec9d1580.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378855/normal_5ff6b46c67398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444882/normal_6021541313093.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temefolix.epizy.com/12239979170.pdfIn PDF document text
    • http://woxariwete.rf.gd/esmo_guidelines_advanced_breast_cancer.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE725 5328 bytes
SHA-256: 3e3f9ba96f35d0ebf68b6188d96936b944243fa5863df14e5666676f9282632b
font_01_sfnt_off0000f937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF937 10660 bytes
SHA-256: 12f5deebd976d0c3b7f522d33be1d2245bbbde876bb099b5cf112d788b7f8bc2