Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd78ddff658159f8…

MALICIOUS

PDF

79.8 KB Created: 2021-03-13 17:49:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9a740732859e55e6b6146c38c0a8a00d SHA-1: 5d4c0aeaca20dfecea1e35941cc2562564fd4579 SHA-256: bd78ddff658159f8a00381c9e33e72ce03931bddf893e22cfc9235b3bbf787a1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://mezovuduw.ru/strik?utm_term=different+types+of+research+methods+used+in+health+psychology PDF link annotation
    • https://kilosite.weebly.com/uploads/1/3/0/7/130739696/kexowuterebatakod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447662/normal_60298a89dba84.pdfIn PDF document text
    • https://vegekevovixo.weebly.com/uploads/1/3/1/4/131437475/d848156e622654c.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/rusowosafatakup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460072/normal_5fde692f53d96.pdfIn PDF document text
    • https://kemadevuweseroz.weebly.com/uploads/1/3/4/8/134878187/9767051.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/hjhehfG/57838152093.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424696/normal_6040b0843fedf.pdfIn PDF document text
    • https://xalosexi.weebly.com/uploads/1/3/4/6/134685437/8295050.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/gfLidhh/faguxewiloxonibutokiposo.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/8pjdUaq/drag_bike_racers_mod_apk.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
    • http://gemimixobisuju.epizy.com/31003053157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/318f1360-9e13-4e9b-bff8-9ede9b4c0a05/graco_pack_n_play_quick_connect_mattress_size.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/6585501482.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/71536759404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cab1e16-f70a-4bdf-b8cf-0b44ee1ff9bc/pexemubivumipi.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/power_book_11_ghost_episode_11.pdfIn PDF document text
    • http://zofopopisi.rf.gd/new_bodo_songs_of_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e29a26f-7633-423c-a5bc-000501af5789/kugibanuxizexodisegakof.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_off0000e99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99C 5552 bytes
SHA-256: 0b8c3ae7b825bf3a3117054175c46595759dbd4d1908a114e2630b6c566867c3
font_01_sfnt_off0000fc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC59 10944 bytes
SHA-256: 45da3d1087fe330a055eda5fcca5a8723eddb00e469bdf1dd3889322d0f82f4a
font_02_sfnt_off0001217b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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