Malicious PDF — malware analysis report

Static analysis result for SHA-256 1806fc5c0118e6c7…

MALICIOUS

PDF

91.3 KB Created: 2021-03-25 08:03:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6d63f62ad0bd1c57ab90e9ff455e5aa1 SHA-1: 5480342223e9520a35a1cf02648c42ad6f26d878 SHA-256: 1806fc5c0118e6c75f1635c8a49cd153b88bd6a8dc2df973b5f750d0ad2dda25
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains, indicating a link farm or SEO abuse tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and external links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://soxebez.ru/strik?utm_term=5th+edition+dungeons+and+dragons+player%2527s+handbook+pdf PDF link annotation
    • http://lobabinuladeri.medianewsonline.com/broiler_management_in_nigeria.pdfIn PDF document text
    • http://kufejat.sportsontheweb.net/kixisujikili.pdfIn PDF document text
    • http://lg-supportteam.com/amc_8_2019_results_singaporeayls4.pdfIn PDF document text
    • https://mowolonob.weebly.com/uploads/1/3/4/8/134874237/xemizixusixobikujup.pdfIn PDF document text
    • http://workbykoder.xyz/how_to_make_water_heater_stop_leakingt2rjb.pdfIn PDF document text
    • https://bekawoxe.weebly.com/uploads/1/3/4/5/134529307/kodafukexo-robav-xuxerifef-pazikefelu.pdfIn PDF document text
    • http://zabavnyi-slon.ru/where_to_donate_old_test_prep_booksgx6y0.pdfIn PDF document text
    • http://napufokotipo.getenjoyment.net/xexubevuv.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/9851957042.pdfIn PDF document text
    • https://lilonukile.weebly.com/uploads/1/3/4/7/134767916/tegibafumi.pdfIn PDF document text
    • http://vumajufeboxidik.mywebcommunity.org/bhagavath_geethai_tamil.pdfIn PDF document text
    • http://zolepop.mypressonline.com/rights_of_bailor.pdfIn PDF document text
    • https://wujibinofowe.weebly.com/uploads/1/3/1/3/131383737/nepenoje.pdfIn PDF document text
    • https://tirepululavapiw.weebly.com/uploads/1/3/4/5/134576363/6d1f790ac68bd3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7e70056c-c2aa-4e53-98c5-50750123c107.filesusr.com/ugd/f8ae5d_24270fc3f0a24850b624cc31c8d04286.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/pewurediburi.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/xodalexobuxosizitiwo.pdfIn PDF document text
    • https://fecd0c08-032d-4b8b-b26c-6108aca7a00f.filesusr.com/ugd/a87c8b_4b96cf85b5d34584bf088b3d7f1106c2.pdf?index=trueIn PDF document text
    • http://romakilax.myartsonline.com/structure_activity_relationship_of_antifungal_drugs.pdfIn PDF document text
    • https://7737876a-f762-42ef-af6f-18b78abacabf.filesusr.com/ugd/9066bd_1675b90a5196469999b92a0735b6b0fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/97073953129.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/chronicles_of_narnia_order_films.pdfIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_68618f8999df4bdfb43d5f3e9551db7c.pdf?index=trueIn 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_off00012394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12394 5672 bytes
SHA-256: b29d7bfe209a3577a5c55fd36a1b1f6929234c1b48005aa2123d50dec8e0e7f0
font_01_sfnt_off000136ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136EC 11356 bytes
SHA-256: 5361c01c7ecefd044d97ff416b48f1bf5b0289c234948fe658f6f37b7f54d92b