Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb45db30826cafa…

MALICIOUS

PDF

71.6 KB Created: 2021-01-18 21:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e8702241b92570c15959c9f7f0d38a7 SHA-1: 12b9b112c0f5c21176fc01665affc7427f77d028 SHA-256: 7eb45db30826cafa0e83711c500a4b634308d2ca65a2859c4ee4dfcc0cc85494
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified as a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The primary purpose appears to be directing users to potentially malicious or phishing content hosted on various disposable domains and file-sharing services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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 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://trafffi.ru/123?utm_term=liga+boliviana+fixture
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/e93d15b7dfd.pdf
    • https://site-1175829.mozfiles.com/files/1175829/bebirijajakivukexot.pdf
    • https://site-1176088.mozfiles.com/files/1176088/boo_at_the_zoo_2020_asheboro_nc.pdf
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/3579490.pdf
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/32d4aa6.pdf
    • https://vazitaxigenot.weebly.com/uploads/1/3/4/6/134640409/dowufaso.pdf
    • https://site-1167941.mozfiles.com/files/1167941/bargain_hunter_uk.pdf
    • https://site-1171568.mozfiles.com/files/1171568/template_design_background_free_png.pdf
    • https://site-1178075.mozfiles.com/files/1178075/girlfriends_guide_to_divorce_imdb.pdf
    • https://xuberirerumona.weebly.com/uploads/1/3/4/5/134586272/7842761.pdf
    • https://site-1175279.mozfiles.com/files/1175279/33581510257.pdf
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/365b01eb42e25c.pdf
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/ditexema.pdf
    • https://vonegulozezuxe.weebly.com/uploads/1/3/4/3/134371031/93ccfdcf5ca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vanatul/gisujesexujuv.pdf
    • https://s3.amazonaws.com/wunojipu/charlie_banana_diapers_target.pdf
    • http://daxevekiwenux.epizy.com/songs_2018_punjabi_hd.pdf
    • http://wapudajikipidem.epizy.com/wosow.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc09.bin
0324950e66fa993cecc0f5c2634f5db70d3bd41e16f4fe1e0cb30f33e74bbed3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC09 4968 bytes
font_01_sfnt_off0000ed1b.bin
01f85ea4f9fe9f863e0f63061614324175bf67b75152f7b065c2b2f8b120ebd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED1B 10800 bytes

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