Malicious PDF — malware analysis report

Static analysis result for SHA-256 9345091f79513032…

MALICIOUS

PDF

77.9 KB Created: 2021-02-04 07:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: dbe061bb76d58423973f3f6b096f1c92 SHA-1: 3c472ab657b1215006dfc125081eeb67cec9078a SHA-256: 9345091f795130325896e579b9706de6538544c0c699962a4a2b5c005ead1f2b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets and Weebly-hosted PDFs, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attempt to manipulate search engine results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://jottigo.ru/aws?utm_term=renal+artery+stenosis+treatment+guidelines PDF link annotation
    • https://banafazag.weebly.com/uploads/1/3/4/3/134325205/4581047.pdfIn PDF document text
    • https://fuzifilagowiw.weebly.com/uploads/1/3/4/6/134698760/443458.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/noloj.pdfIn PDF document text
    • https://devigejijakefu.weebly.com/uploads/1/3/2/7/132740662/goxabufino.pdfIn PDF document text
    • https://cdn.sqhk.co/risevejuxik/hNiiiaM/fipimixomipu.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/ibtU5jg/38154156820.pdfIn PDF document text
    • https://movudari.weebly.com/uploads/1/3/1/0/131070737/872478c8.pdfIn PDF document text
    • https://cdn.sqhk.co/duravukikemo/kYyv9hc/28026539539.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/d835d1e.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/chgieii/uncontrolled_railroad_crossing_warning_signs.pdfIn PDF document text
    • https://futinubub.weebly.com/uploads/1/3/5/3/135328842/2640678.pdfIn PDF document text
    • https://sanajupa.weebly.com/uploads/1/3/1/4/131406847/kakuvenojisuz_wamelebexedera_samagebikufi.pdfIn PDF document text
    • https://kifeketefisub.weebly.com/uploads/1/3/5/3/135347095/8248201.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://s3.amazonaws.com/risalenefazozo/berukigururimeraketes.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/break_into_the_dark_song.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/technical_spec_sheet_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/bhp_billiton_limited_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/cbse_net_exam_form_last_date.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/bluebells_childminders_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/boss_song_video_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/97738667448.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/pomosiwamam.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE752 5136 bytes
SHA-256: af6bc78e954916027b86c2a1ecbdff767a67ed9d94157122587fee4f9f7475d7
font_01_sfnt_off0000f8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B5 10200 bytes
SHA-256: aded9bb5a0a2591f7e9320da58b8d7fb36d1dd4895c28858776264f2b4b788f6
font_02_sfnt_off00011b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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