Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ede36aaac03d38…

MALICIOUS

PDF

77.8 KB Created: 2021-04-05 18:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: bad90c69608fbdb8c292ac7a21b05b22 SHA-1: 1ed96a85c378fc23f48b432833a7d79f8279f0d7 SHA-256: 95ede36aaac03d3831a0638d130876b24f21a3c86a2561e80182c07306bc2037
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, which is characteristic of SEO spam or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure suggests the document's primary purpose is to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=2010+town+and+country+oil+change+reset PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455669/normal_605568bb5fd02.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/hdgfsgj/tefupori.pdfIn PDF document text
    • https://cdn.sqhk.co/wexifidobafo/iQlMij9/how_to_beat_homescapes_level_24_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/sazuzaxokuk/i6aiagg/colorful_wood_wallpaper_for_android.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/mexubades.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388413/normal_6041b1e536f23.pdfIn PDF document text
    • https://xazoxudigoruxov.weebly.com/uploads/1/3/4/0/134095876/tuzulelekemidekoxuk.pdfIn PDF document text
    • https://gilowowiwojet.weebly.com/uploads/1/3/4/3/134314399/3795951.pdfIn PDF document text
    • https://cdn.sqhk.co/loboremetoxe/Fq0jfgf/lock_screen_wallpaper_black.pdfIn PDF document text
    • https://rikekipodoze.weebly.com/uploads/1/3/0/7/130776447/0461212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491936/normal_5fd7cef66e64b.pdfIn PDF document text
    • https://cdn.sqhk.co/sebazisop/bjanrgd/14505828436.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/240942.pdfIn PDF document text
    • https://wosabizovores.weebly.com/uploads/1/3/4/5/134577485/dfecd66c74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a4030f05-ef6c-4082-bb1f-311947f0a31a/how_to_estimate_reinforcement_in_slab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c727c1a-4041-4480-85e7-6212f638cee9/pepojov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15469b60-b39e-40a9-8791-45cf70640ee6/how_to_recycle_canon_ink_cartridges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ca94f31-e0a1-4ca4-bf9b-a6ac7d5bbed5/wordpress_download_manager_pro_nulled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2657e0ba-bb01-4651-8cf0-4390ec210960/huffy_cruiser_bike_26_inch_walmart.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_off0000e57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57E 5508 bytes
SHA-256: a917149895e9ad6ea7ec52aa9474827122c5d69c28023ac51c3db33c88f4a086
font_01_sfnt_off0000f835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF835 10356 bytes
SHA-256: e808d3a78f4b0a84faaa0ef38153c6c43b8f689547ec787e99475789450436c7
font_02_sfnt_off00011b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B95 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71