Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f71fdef0ae4bdf…

MALICIOUS

PDF

96.8 KB Created: 2021-05-18 07:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3cbfdbfd7b5713bd0303ed08406ee99e SHA-1: 3d5531998d443ed92078db73fe0fda779d96c3d8 SHA-256: d0f71fdef0ae4bdfa0b00b7b46a63b3910ea29b8d3b6623f0b6a1c99383170c9
126 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this malicious intent. While no scripts were explicitly extracted, the ML classifier flagged the PDF as malicious with high confidence, and the presence of embedded URLs points towards a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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://leonvi.ru/strik?utm_term=simple+cv+template+word+pakistan PDF link annotation
    • https://ragitodis.weebly.com/uploads/1/3/4/7/134753297/wetenijejiziwa.pdfIn PDF document text
    • https://lututigit.weebly.com/uploads/1/3/5/3/135335707/2284922.pdfIn PDF document text
    • https://putojedenavaxo.weebly.com/uploads/1/3/2/6/132683165/bimuwo_pepalajire.pdfIn PDF document text
    • https://kuvitarige.weebly.com/uploads/1/3/4/0/134095916/woxufeziv_pesusowivago_jolagulopu.pdfIn PDF document text
    • https://bigifami.weebly.com/uploads/1/3/1/4/131407708/pariwoz.pdfIn PDF document text
    • https://gizepigonezes.weebly.com/uploads/1/3/4/9/134901759/gilevogek.pdfIn PDF document text
    • https://xiduxerajul.weebly.com/uploads/1/3/4/6/134696605/54113c1b8dbc7d.pdfIn PDF document text
    • https://petavigavixate.weebly.com/uploads/1/3/4/4/134459614/6add0.pdfIn PDF document text
    • https://safadere.weebly.com/uploads/1/3/4/0/134018032/mosifop.pdfIn PDF document text
    • https://winetokazujubap.weebly.com/uploads/1/3/4/3/134321452/rufuzipugamisupeguzi.pdfIn PDF document text
    • https://lupipoga.weebly.com/uploads/1/3/4/4/134402738/8593266.pdfIn PDF document text
    • https://dogopakuva.weebly.com/uploads/1/3/4/6/134698139/6879178.pdfIn PDF document text
    • https://tasitonedilegu.weebly.com/uploads/1/3/5/3/135301248/gubijevoriva.pdfIn PDF document text
    • http://memubalejegezur.66ghz.com/nox_player_android_emulator_windows_7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0a5894c-5191-4275-8739-102e3ab99583/gatisudenolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edfac502-bbfc-444e-8790-1334f6b5de7d/17903031390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b86505e-6dc3-4665-b73d-5cc1f19110ee/tecumseh_ohh60_carburetor_linkage.pdfIn PDF document text
    • http://fokozagizek.rf.gd/avocent_dsview_4._5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76584099-0506-4328-ba57-10d4124cc0a4/how_to_program_kwikset_909.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/13208373269.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/what_is_the_definition_of_power_electronics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ce4f91d-1241-4597-8be9-b9593193e756/xozarixivot.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/fikukil.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/87517164010.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2D 5536 bytes
SHA-256: 8cf79747111326fd091ba71c66a4b82a98ed126c7bb25739c0036f762013ddca
font_01_sfnt_off00012ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF4 2468 bytes
SHA-256: dd1c0d0f4c4d497197f89a70af652e8df89058bf81fee1dc90169ec4afbf4d4c
font_02_sfnt_off00013a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A24 11000 bytes
SHA-256: 65f81b4793efaac9f7de455c590e87b583e1b52a350718473a61fc6527115366
font_03_sfnt_off00015f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F49 16164 bytes
SHA-256: 58b04abd4a2cde557a820e918121ec9738f9de37d4949e7b8c9e4ecf18f5695c

Open this report in the interactive analyzer, or submit your own file for analysis.