Malicious PDF — malware analysis report

Static analysis result for SHA-256 235d92c6052d06a1…

MALICIOUS

PDF

129.2 KB Created: 2021-05-21 11:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d1442f36dd4757098d9f38fc32f3ee55 SHA-1: 20611798c57ead52a5890216820260fb7c6fb84d SHA-256: 235d92c6052d06a125d8fa8aee75a224e4fd95927b8fd460157516e6746d5a79
206 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. One URL, 'https://baarspo.ru/strik?utm_term=jack+the+giant+slayer+full+movie+in+hindi+download+mp4moviez', suggests a lure for pirated movie downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to deliver malware or phishing content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://baarspo.ru/strik?utm_term=jack+the+giant+slayer+full+movie+in+hindi+download+mp4moviez PDF link annotation
    • https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/a85a36b9c623.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/fusodorobubobenid.pdfIn PDF document text
    • https://labopepiw.weebly.com/uploads/1/3/4/7/134747507/pizajefufe.pdfIn PDF document text
    • https://faranopiz.weebly.com/uploads/1/3/5/3/135332407/foravoligaze_rebavotow_xerofo.pdfIn PDF document text
    • https://dixozetazexode.weebly.com/uploads/1/3/4/4/134472526/8951814.pdfIn PDF document text
    • https://fuvekusegubo.weebly.com/uploads/1/3/4/7/134736786/654a369dede9d.pdfIn PDF document text
    • https://dikijezirepa.weebly.com/uploads/1/3/2/8/132815872/darosokebuximaroz.pdfIn PDF document text
    • https://tikofasej.weebly.com/uploads/1/3/4/6/134615027/wuzefafoxeb.pdfIn PDF document text
    • https://sukodijam.weebly.com/uploads/1/3/4/5/134516983/wuzexidewaxa.pdfIn PDF document text
    • https://litepuvib.weebly.com/uploads/1/3/4/7/134741427/1260976.pdfIn PDF document text
    • https://vimugowome.weebly.com/uploads/1/3/4/3/134323071/zaxogara.pdfIn PDF document text
    • https://fevuvewuvadudu.weebly.com/uploads/1/3/4/6/134650824/nepima_wowiwinotisame.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/b17ebdbc-4bf4-4351-9651-8270f2c564b1/what_is_the_most_important_legacy_of_marbury_v._madison.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea6ff784-141b-4333-911c-53e58aac2747/how_to_split_user_stories_in_jira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a35f9544-ce84-410d-89fc-eff76d6335e9/what_are_the_5_management_theories_for_organization.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eab957a4-47e3-4f00-93d0-f864c3ee54a6/28032165107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb7b1c92-580d-4a65-8aa7-f4cdc8eeea40/sat_writing_and_language_practice_tests_and_explanations_cracksat.net.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9d3a6eb-6aac-4a8f-b2c2-a16a6d323b2b/ibn_kathir_quran_center_sharjah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/137e9aa0-e609-46bd-8af4-613427dcbe13/panasonic_plasma_tv_viera_55.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000170c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170C6 3040 bytes
SHA-256: 20d8b56c16c3609fb6e24143b6a369ec569aa48f7b76bf72401f3f946a491cb2
font_01_sfnt_off00017bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BB2 6012 bytes
SHA-256: f14d22a01ca98d34ae23c0ee19b02202bc03dd0ee154cde35c9671294de5230c
font_02_sfnt_off00019029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19029 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_03_sfnt_off00019b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B8D 12040 bytes
SHA-256: c43772f48ed89eb9eb4459d864595e01f9871a8d6aca261169c93acaed664408
font_04_sfnt_off0001c408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C408 16284 bytes
SHA-256: 332aaf5e2751e9276d99190234695663b222e5784a6a14b1443a9c70ee8f7c86
font_05_sfnt_off0001d9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9EA 8196 bytes
SHA-256: 9e73b43ec1584802ed56bba4aa6dcd90fbf359943d0660b2d2a5f6897993c8d8