Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f4ad4f7ccbdff7…

MALICIOUS

PDF

79.7 KB Created: 2021-03-24 11:30:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8b6e63034492a5df7fb396c5ef6a94d6 SHA-1: 9649d78830ef0a3b185ae5e625091726ea148529 SHA-256: 89f4ad4f7ccbdff7412558d8df4722c3eb6fc0db9778f13080c594f077d35dfb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=warframe+conclave+guide PDF link annotation
    • https://cdn.sqhk.co/zelagagunogo/dahaier/marvel_contest_of_champions_tier_list_november_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/mgekXrf/vettu_cake_recipe_in_malayalam_video.pdfIn PDF document text
    • https://cdn.sqhk.co/zumovinej/dRjsAge/38397948664.pdfIn PDF document text
    • http://gefavofatefazis.iblogger.org/99606882009.pdfIn PDF document text
    • http://fasibada.22web.org/picadora_manual_de_cebolla.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/ict5nid/wivor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451566/normal_60513bbf0f7d7.pdfIn PDF document text
    • http://mezoterilijixa.22web.org/what_causes_coliform_bacteria_infection.pdfIn PDF document text
    • http://rukilalo.iblogger.org/epson_ex3220_bulb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380382/normal_5ff12e9d72de7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369495/normal_5fe5c6f1a0084.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2547eddd-fd27-4717-9bdf-ae004c371edc/bogimejogapazevomepejamem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30cc11d6-acfc-488c-b1a4-40688eb41e4a/zujakubixogufitajotob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be53dd85-2162-4f14-bb0a-386196a88a77/hp_deskjet_2545_scanner.pdfIn PDF document text
    • http://lavowatovodab.rf.gd/line_6_pod_pro_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bdc0df7-54b7-48c2-af72-680f46395932/tuzapegud.pdfIn PDF document text
    • http://kokutefuto.epizy.com/20465680122.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/bigutapoziruvanutilarimar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a149b410-9d4f-465f-9740-f75f520d4dd9/19099087239.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/43888465741.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/pimojemus.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_off0000f91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91C 5236 bytes
SHA-256: 5390b29ba01faa97d615bc935a5a67406cff35e5d04cdcbece639a1a54c4c643
font_01_sfnt_off00010aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AED 10832 bytes
SHA-256: fbbbb64047b439447d842173ad4a6fbd8ced7f925b9edd51cf8d01d01d2ca360

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