Malicious PDF — malware analysis report

Static analysis result for SHA-256 722d4c5f0df55e01…

MALICIOUS

PDF

76.5 KB Created: 2021-05-01 02:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6246fe5cd505a5a3f403ebb8f8650fcb SHA-1: d92c6be3d37c1fe58bb16815060f32f59847b760 SHA-256: 722d4c5f0df55e011309722c77fd36596e2ef93759130156c2311940767d46f7
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though partially obfuscated, suggests a lure related to router reset instructions, which is a common tactic for phishing or malware delivery. The presence of external URIs and the link farm heuristic indicate a strong intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/strik?utm_term=how+to+reset+netgear+wnr2000+v4 PDF link annotation
    • http://sevoxotedeki.medianewsonline.com/altivar_12_programming_manual.pdfIn PDF document text
    • http://xobaxibudizoba.22web.org/adalla_manasu_naa_songs.pdfIn PDF document text
    • http://lidagejelotodu.22web.org/how_do_i_turn_my_bath_into_a_jacuzzi.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/which_is_not_a_conflict_resolution_skills.pdfIn PDF document text
    • http://tetizeniwa.mypressonline.com/61228346723.pdfIn PDF document text
    • http://jumofusifabezol.66ghz.com/37156032130.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sesuvuruv.epizy.com/27192613527.pdfIn PDF document text
    • https://e714dd98-3e42-4604-aba1-6d4b2506b1a8.filesusr.com/ugd/742965_d56ae71a793d4bf888b7f40389f0aaf5.pdf?index=trueIn PDF document text
    • http://japorivexasore.epizy.com/vapegivoresujivizakefoji.pdfIn PDF document text
    • http://lisunamubeso.epizy.com/29644974301.pdfIn PDF document text
    • http://tuxefofoxomar.epizy.com/lugukoketo.pdfIn PDF document text
    • http://reloroxegexe.epizy.com/armageddon_imdb_parents_guide.pdfIn PDF document text
    • http://toxawilel.epizy.com/40140466589.pdfIn PDF document text
    • http://lalukegadugubu.epizy.com/aunt_jemima_complete_pancake_mix_nutrition_information.pdfIn PDF document text
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_4eb3ee8d76f14d17a6720203f6a70912.pdf?index=trueIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_2b9042c781954408832d85ea0b6a9e54.pdf?index=trueIn PDF document text
    • http://letelexedat.epizy.com/mcgraw_hill_connect_instructor_guide.pdfIn PDF document text
    • https://313cea95-bd78-4864-9d9d-3b26c3bbe0bd.filesusr.com/ugd/2142af_76a73068641046f1b03c0096d7190d05.pdf?index=trueIn PDF document text
    • http://jodafibo.epizy.com/barry_callebaut_annual_report_2014.pdfIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_348d24d5a6ab4a7c8f6f58d4b66430e7.pdf?index=trueIn PDF document text
    • http://felubumasosazi.epizy.com/nejadisem.pdfIn PDF document text
    • https://ad0d0dbb-669b-46a9-85df-79487014a0f3.filesusr.com/ugd/00d95d_dd9d075e737945f3956cceb3bc6b139a.pdf?index=trueIn PDF document text
    • http://sadakukozami.rf.gd/saregekanatobonajaxit.pdfIn PDF document text
    • http://tinegupufijogun.epizy.com/the_story_of_an_hour_with_line_numbers.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_off0000edd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD6 5296 bytes
SHA-256: d38bdb66dd8ce6aec2367404fab7b319b73225faebe20b52bbaf183ef0f20238
font_01_sfnt_off00010005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10005 10628 bytes
SHA-256: 1250234c830ed8baf4f03078e30a3e31836f6ea7619310d314b19b0bc7a2402c

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