Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d125c9ee3ea7404…

MALICIOUS

PDF

101.8 KB Created: 2021-05-13 10:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a0c6438b509cd9c24786825faff82875 SHA-1: 7676f852a402f46afbb87aa5cd089c3676dd5a34 SHA-256: 7d125c9ee3ea74042efa40a6207bd6f4a6c14087f4f440cbe83769677386fa1f
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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+connect+lg+wireless+subwoofer+to+soundbar PDF link annotation
    • http://rmk4sale.xyz/sapoxemamutififwmaau.pdfIn PDF document text
    • http://hookup754.fun/85121938891s9ul5.pdfIn PDF document text
    • https://diwejixa.weebly.com/uploads/1/3/4/6/134629966/kopogenub_pimijofujen_kuzeseronofaba_xexelaji.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://zesamoa.online/download_one_call_away_by_charlie_putt_mp3_free_download09x8y.pdfIn PDF document text
    • http://rmk4sale.xyz/asus_sabertooth_x79_tuf_motherboard3u0k4.pdfIn PDF document text
    • https://vejevidumuruje.weebly.com/uploads/1/3/5/3/135302175/5d6e07.pdfIn PDF document text
    • https://masiwirisiniziz.weebly.com/uploads/1/3/1/4/131453333/xakumi.pdfIn PDF document text
    • https://patakobenidirok.weebly.com/uploads/1/3/0/7/130775678/d9a7a179eaf.pdfIn PDF document text
    • http://dressnbuy.com/suviseref0t9s.pdfIn PDF document text
    • https://wexotagupoma.weebly.com/uploads/1/3/2/8/132814474/derizewipuse-womukuzo-vutogisip-lijowizipeb.pdfIn PDF document text
    • http://modalidetefid.iblogger.org/weather_report_today_bandipur.pdfIn PDF document text
    • http://geleostone.online/setubusoxozatebafesimzzeaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fulezazajudoful.epizy.com/the_wanderer_book.pdfIn PDF document text
    • http://zufagubiles.epizy.com/lake_glenville_fishing_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216a44ea-6777-4226-81dc-1d00a5622eb2/average_price_of_used_baby_grand_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbf860b9-d2ba-4e6a-9514-f59ce2fa6543/possessive_nouns_worksheet_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/beastie_bay_mod_apk_2._1._6.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/what_is_the_summary_of_diary_of_a_wimpy_kid_the_long_haul.pdfIn PDF document text
    • http://kujazidi.epizy.com/cisco_nexus_9000_vrf_configuration_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b14708-8b9c-4b4e-88bb-35c100f73b7d/wanoboni.pdfIn PDF document text
    • http://tositasi.epizy.com/famakopivi.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/36223123688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/123c6d77-752a-4564-9a9b-32cfdd7c3b8e/i_heard_you_paint_houses_frank_the_irishman_sheeran.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d48f7d5-9a33-4a97-99af-1f2634256472/gre_math_review_data_analysis_exercise_2.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/auto_insurance_underwriting_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/48167975443.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B9D 5384 bytes
SHA-256: 6d8d304f185b8d68f1aa836e6cfe1f24357ac610ff816dd16bf4690120c92631
font_01_sfnt_off00015e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E08 12684 bytes
SHA-256: 9719d22032eda45fc7be117696abab94dc5215d01d104f09f31a53b3dfe5dae3