Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb72cae4f75eb74f…

MALICIOUS

PDF

80.1 KB Created: 2021-04-03 12:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0838d69d74b4edfddfd9884a3ba78181 SHA-1: 507525a3ce39b392abcbde1bad48d50fb82a060d SHA-256: fb72cae4f75eb74f75a872601adeb64d0f034b867cb3b9afc8b258459b0bd779
186 Risk Score

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 0.9967

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://lozipotod.ru/aws?utm_term=how+do+you+replace+the+igniter+on+a+weber+summit+grill PDF link annotation
    • https://xodinelexobi.weebly.com/uploads/1/3/1/4/131438891/1987677.pdfIn PDF document text
    • https://sapilijufidukuw.weebly.com/uploads/1/3/4/9/134901451/24074.pdfIn PDF document text
    • https://pepagefowajuna.weebly.com/uploads/1/3/4/7/134738543/2249703.pdfIn PDF document text
    • https://cdn.sqhk.co/xajegakagiz/gjgehbp/viduxuwaweparidog.pdfIn PDF document text
    • http://natlab.ru/69490093314cxydn.pdfIn PDF document text
    • https://cdn.sqhk.co/jatobeguji/fihheid/black_axolotl_pet_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/cyMrthc/wokikegisoluje.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/gjgYUuY/furia_de_titas_online.pdfIn PDF document text
    • http://tizakeguwowil.22web.org/child_protection_wa_mandatory_reporting.pdfIn PDF document text
    • https://rofasaxoropop.weebly.com/uploads/1/3/5/3/135316675/zizivamivadinanerov.pdfIn PDF document text
    • https://cdn.sqhk.co/tagodepa/iegcjdk/kanexuzibewarimej.pdfIn PDF document text
    • http://creditscorerepair.info/kivasezuju060ww.pdfIn PDF document text
    • https://cdn.sqhk.co/wixadigizal/RFjuyk9/35395538254.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/gjsxgdV/snake_io_slither.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/jcEhjge/best_chicken_booyah_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/kebubupoxiz/Sm1K4zN/my_t_mobile_account_number_and_pin.pdfIn PDF document text
    • http://walletelectrum.buzz/piano_lessons_video_download_freeuc4as.pdfIn PDF document text
    • http://podarokinsta.site/translate_spanish_menuy2zvk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vatimofaxemog.rf.gd/50111996724.pdfIn PDF document text
    • http://lelekon.epizy.com/wusosevupixiganidimuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42dee809-220a-416e-9be1-ca235b38b921/pujezikenez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3df780af-cdfd-46f0-96b6-e7aeb2bd8fdb/how_to_trade_indices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d11a0a22-80e7-46a5-8e5c-7f1cc179cbb2/tugaxed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e66c2e-1e00-4f21-8935-8cdbf724b9bb/1136786689.pdfIn PDF document text
    • http://luwatejanif.epizy.com/67754502086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31a64bad-1535-4d0b-a054-97c38be83c4e/nejazufefubusutozufe.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_off0000f928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF928 5780 bytes
SHA-256: ee3f6185fad1ca162f5695e1e7959ce218f0e9a706df8cc8f5551019543b72cc
font_01_sfnt_off00010cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBC 11100 bytes
SHA-256: e1e5e946162cf1e216e565771a08cb2dcfee9398fa65ad4670f0a8c0917a5cfa