Malicious PDF — malware analysis report

Static analysis result for SHA-256 705d3427edcd5ee9…

MALICIOUS

PDF

82.8 KB Created: 2021-03-22 12:20:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0490bf0e44417bd93d8966de74d6c01a SHA-1: 9e4f2fec17eea638cc2b3f33d2cf5d594d6e6586 SHA-256: 705d3427edcd5ee9b3d4a6d652d846bc774600dd6ad054f196ac8911dfaaba01
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute malicious content. Heuristics indicate a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also strongly flagged it as malicious. While no scripts were extracted, the sheer volume of links and the detection results suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://lapivakop.getenjoyment.net/free_abstract_reasoning_practice_tests.pdf In PDF document text
    • http://gajonedorebuko.mywebcommunity.org/53096919680.pdfIn PDF document text
    • https://vosanodamenero.weebly.com/uploads/1/3/1/4/131438282/aaf9e.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/gjXHxDI/farm_heroes_saga_apple_levels.pdfIn PDF document text
    • http://subakegewoje.sportsontheweb.net/63346633119.pdfIn PDF document text
    • http://goods-amzon.com/how_to_reset_a_delphi_xm_radioh990i.pdfIn PDF document text
    • http://lami-lashes.site/73596823430lcvdd.pdfIn PDF document text
    • https://lafowesatumu.weebly.com/uploads/1/3/4/5/134503032/5073392.pdfIn PDF document text
    • https://zunovuxosuseso.weebly.com/uploads/1/3/4/4/134497136/1cbd80cc95.pdfIn PDF document text
    • http://amaryllis.space/60978451468mi96c.pdfIn PDF document text
    • https://wubugivaruj.weebly.com/uploads/1/3/4/6/134669137/misalawofer.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/c6rhbif/chex_quest_2_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/zapuduve/Ridhegg/33116796301.pdfIn PDF document text
    • http://zitarekatinupas.sportsontheweb.net/25475081293.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/HhfZ9wd/99860200241.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/jahjhfp/lethargy_symptoms_nhs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/0IJhScypsXo/wb?keyword=c%20a%20reference%20manual%206th%20editionPDF link annotation
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_bba91ea87cd042dcbd2d1faf7cdd1fa8.pdf?index=trueIn PDF document text
    • http://kutubuge.rf.gd/japofelerazak.pdfIn PDF document text
    • http://wodixosikomo.rf.gd/the_art_of_leadership_and_supervision_free.pdfIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_fc49fffbc85f47aaa9b5c7c50b187860.pdf?index=trueIn PDF document text
    • https://a6132035-7465-4fe4-be4e-2faa96c22dab.filesusr.com/ugd/cf950b_2e3849c2751d453cb58fef2bb159c56d.pdf?index=trueIn PDF document text
    • http://tadidemoribezor.epizy.com/conquista_de_la_nueva_espaa_bernal_diaz_del_castillo.pdfIn PDF document text
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_8cb19f4f192548c3800cd370339f0490.pdf?index=trueIn PDF document text
    • http://difosotaj.epizy.com/manual_casio_3157_espaol.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000120b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x120B3 18260 bytes
SHA-256: edb3943f68cdc8a359e27b360c8724af42556b49b7f5447b4f7ee99c58792b19
font_00_sfnt_off0000e8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D3 5144 bytes
SHA-256: a84f86bc15a0f7578be71d1ba7f3625b9ac169e2ca32b6018dd09e4789c1efbf
font_01_sfnt_off0000fa24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA24 11264 bytes
SHA-256: f4c5444bf1173b25be83fc9184a821b042111d8901080769b39bd35bb7a42f2f

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