Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7acce1dff77cdbb…

MALICIOUS

PDF

81.7 KB Created: 2021-04-22 01:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7be3ab082ad075a4d6e0c7fb0680348 SHA-1: baadee6fca5015df4042e06045e9cbde2bd0c09b SHA-256: b7acce1dff77cdbb24683e84ccfec4022647abf7cc5799ee7a9c20d3546dae81
126 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it's a link farm on disposable hosting, with a high ML score and ClamAV detection for phishing and trojan activity. The embedded URL, 'https://ponafet.ru/strik?utm_term=how+to+change+light+bulb+in+ge+advantium+microwave', is likely the primary lure, directing users to a malicious site under the guise of a helpful guide. No scripts were extracted, but the PDF structure and URL suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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://ponafet.ru/strik?utm_term=how+to+change+light+bulb+in+ge+advantium+microwave
    • https://static.s123-cdn-static.com/uploads/4445130/normal_5fe4f65e423b0.pdf
    • http://sekijad.iblogger.org/the_wifes_lament_summary.pdf
    • http://tisanonorupo.22web.org/18363100521.pdf
    • https://cdn-cms.f-static.net/uploads/4471995/normal_5fe788d01ae42.pdf
    • http://boleligez.22web.org/xitejinumivufakiminovo.pdf
    • https://cdn-cms.f-static.net/uploads/4369659/normal_6019105db8192.pdf
    • http://sobokapim.mypressonline.com/52219467137.pdf
    • https://static.s123-cdn-static.com/uploads/4461761/normal_5fee7ae8c43f3.pdf
    • http://sodowetan.mywebcommunity.org/jotovetanaguniwezidabefab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_1f569852c95c481ea879a5367da0a35e.pdf?index=true
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_d62e527f4feb4e1abb0e103dc91a826c.pdf?index=true
    • http://mesonunero.rf.gd/mutuboriwibexe.pdf
    • http://dibirat.rf.gd/apiezon_n_datasheet.pdf
    • http://zugawixiwo.rf.gd/18466277188.pdf
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_87e0ae7b97af42d4b095aa392a40852e.pdf?index=true
    • https://78de399b-5cb1-4d05-8290-e7933402b20f.filesusr.com/ugd/10f998_fcdeb8d37417415ca9c19a09005cdf8d.pdf?index=true
    • http://kujafugakare.epizy.com/japagaratepipepasek.pdf
    • http://siwerixu.rf.gd/bendy_and_the_ink_machine_apk_apkpure.pdf
    • http://biwosagamivi.myartsonline.com/does_just_for_me_texture_softener_work.pdf
    • https://ced6af22-cf5f-4df0-9cd6-2d424634d287.filesusr.com/ugd/3eed2b_74192e90dfbd46a9987c2f6c830c3936.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f368.bin
f7936deb072855d9072ff9c37b68fcd3966e3e4d35b7c34ac30fe46d7f3d6d19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF368 5312 bytes
font_01_sfnt_off0001054f.bin
dc2741510bea6992a08fa6e91fb75fa24d759d9b64bcc3d8f5c845597c120727		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1054F 11064 bytes
font_02_sfnt_off00012b0e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0E 4324 bytes

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