Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b60682f9ced564c…

MALICIOUS

PDF

82.9 KB Created: 2021-04-15 21:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 303b1af7128399350157064781cbf62d SHA-1: ec4b01758e023c7eacc6d928cb911dfff0817ee6 SHA-256: 7b60682f9ced564cceb1d32596cc89e5c50879c34f4b99b95a7f5e648aeb7752
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, many hosted on disposable domains, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URL and the link farm structure point towards an attempt to lure users to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=what+are+the+red+lights+in+the+sky+tonight PDF link annotation
    • https://sibubusede.weebly.com/uploads/1/3/2/6/132682984/b0425cc9.pdfIn PDF document text
    • https://wenewemegidipep.weebly.com/uploads/1/3/4/6/134679414/aa3cea.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/dakiwur_xibanowi_tavanofe_wufoloxikizo.pdfIn PDF document text
    • http://raisinshub.club/graco_pack_and_play_waterproof_sheetsl39eu.pdfIn PDF document text
    • http://dietnatur.fun/16671378806y04ow.pdfIn PDF document text
    • https://juladugalevatib.weebly.com/uploads/1/3/4/3/134385664/virupewunetafanafof.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/74468878128.pdfIn PDF document text
    • http://dreamingdeveloper.com/how_to_calculate_combinations_on_ti_30x_iiswajol.pdfIn PDF document text
    • http://gratoraama.website/disuniwon21d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/33bef9d5-c7ab-48b1-9809-69ccabbf5915/different_settings_of_social_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ded4e67-3694-47d2-9afd-9f050fd580a1/is_canon_pixma_ink_waterproof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1921b4-0405-4b0d-9ff4-9ddad523350c/sex_and_the_city_reboot_air_date.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/best_tor_browser_app_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88bcc768-28b5-4cfe-b54e-17a8134a8840/buwafosedajetibexudilexu.pdfIn PDF document text
    • http://zobemodorujo.rf.gd/methane_carbon_dioxide_reforming.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/38625763997.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/kannada_janapada_hadu_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/mf_165_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/98046560773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a349c83-1000-4893-b5ef-31afac14300d/turuwagiramezelugimuza.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF671 5052 bytes
SHA-256: 8a3c5c128d3c9cc905c0bba91c57929b9c07659d562646023485c7acf1858b14
font_01_sfnt_off000107a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A7 11152 bytes
SHA-256: 2425b30509448ef5e10307e7138543daec5be9ce2e43c5e10e5d9de4af3c4aa9
font_02_sfnt_off00012db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176