Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48a211d077de341…

MALICIOUS

PDF

79.0 KB Created: 2021-03-23 05:38:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 28df325e41fcdf2e8db3a55acaa3ae36 SHA-1: 2790a1eeb3501f866192a132eaea62d002ee81a4 SHA-256: c48a211d077de341a826d2bd4cce4dc8ad715d4b678fe0f429b8b286c2acd642
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://dafemum.ru/aws?utm_term=how+to+style+navy+blue+t+shirt PDF link annotation
    • https://jikufowawuful.weebly.com/uploads/1/3/2/8/132814232/3418810.pdfIn PDF document text
    • https://jubekese.weebly.com/uploads/1/3/1/6/131606730/ed63a3e.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/ihjbrjc/short_ride_game_online_play.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487888/normal_6018434f43b81.pdfIn PDF document text
    • https://dijuwinepogiw.weebly.com/uploads/1/3/0/7/130738679/16a01c895cf6c1d.pdfIn PDF document text
    • https://gutalekosipotix.weebly.com/uploads/1/3/4/3/134351461/2783556.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/sCCgjfV/verekiji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390095/normal_5fc6abe45353b.pdfIn PDF document text
    • https://wizudagusosok.weebly.com/uploads/1/3/5/3/135317744/nejumeba.pdfIn PDF document text
    • http://luminar3-download.xyz/add_and_subtract_fraction_word_problems_worksheet8f4zc.pdfIn PDF document text
    • https://nagiwavimev.weebly.com/uploads/1/3/4/6/134612684/wimozelizewir.pdfIn PDF document text
    • http://findattime.com/big_time_rush_boyfriend_musicqbry2.pdfIn PDF document text
    • http://jodujimapiwox.22web.org/what_are_the_different_types_of_textile_waste.pdfIn PDF document text
    • https://fikamuvereza.weebly.com/uploads/1/3/4/7/134754658/fozab.pdfIn PDF document text
    • http://clientesdkb.com/past_tense_worksheet_ks2nz446.pdfIn PDF document text
    • https://fewugoxozo.weebly.com/uploads/1/3/4/4/134441687/58e347dbb139.pdfIn PDF document text
    • https://cdn.sqhk.co/visukodo/3EaKhe7/vixavodekemuxor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nonakiwobituk.rf.gd/ipcc_special_report_on_land_use.pdfIn PDF document text
    • http://tofedig.epizy.com/mufepexujegewamuvuzeje.pdfIn PDF document text
    • http://fufagarafe.epizy.com/motorola_one_android_one_case.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_off0000f3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CE 5128 bytes
SHA-256: 49d118645840e2220724d1ae66928ecbf6121ca789923606caa47f9d0adae657
font_01_sfnt_off0001054d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054D 11916 bytes
SHA-256: 25f446a19eea5d469170624ba7b09e36ff383ac62868b36f9e0caf8bd4688385

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