Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4731ebddc3c96be…

MALICIOUS

PDF

85.0 KB Created: 2021-01-20 05:32:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d5e4df23710630907fae1a0f1d0b1c1e SHA-1: 73a957b6a323cad77813843a067f281ae1423815 SHA-256: a4731ebddc3c96be2aceb22de77e3b5acf2e5cb01a256f62d212e225a333e3fe
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=lesson+3.2+skills+practice+polynomial+power+answers PDF link annotation
    • https://site-1199272.mozfiles.com/files/1199272/75151991659.pdfIn PDF document text
    • https://jobadenel.weebly.com/uploads/1/3/1/1/131164033/fureke_mebikotage_rixeri_zazapolopegatun.pdfIn PDF document text
    • https://zobagitolofoxaz.weebly.com/uploads/1/3/0/7/130739917/d057525a113.pdfIn PDF document text
    • https://fetesebi.weebly.com/uploads/1/3/4/8/134896421/fejixiwegeno.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/tiaYidi/mamizibisetozon.pdfIn PDF document text
    • https://gidutuzewefira.weebly.com/uploads/1/3/1/3/131380066/8b97f6dece1.pdfIn PDF document text
    • https://gikunagab.weebly.com/uploads/1/3/0/7/130738902/dibon.pdfIn PDF document text
    • https://site-1176298.mozfiles.com/files/1176298/mobogenie_for_android_mobile_apk.pdfIn PDF document text
    • https://site-1180756.mozfiles.com/files/1180756/murder_mystery_party_kit_reviews.pdfIn PDF document text
    • https://site-1179801.mozfiles.com/files/1179801/maroon_movie_ending_explanation.pdfIn PDF document text
    • https://rudabukonavapuk.weebly.com/uploads/1/3/4/0/134016662/potojarejadivegen.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/geiachc/queen_greatest_hits_songs_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_5f87df9d5bf80.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/kaplan_gre_subject_test_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/792999307.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_off00010aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAC 5604 bytes
SHA-256: bb5b412e35d40e12416ca5e03148ed73d5aa8026547b84ffdbd9576ebe4e446f
font_01_sfnt_off00011dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCC 11456 bytes
SHA-256: 88b65eeea6af8a092cbd59121d23c93e65e3394118e71e9f11e3a2201e2ae59c

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