Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1437b828bbbadee…

MALICIOUS

PDF

71.4 KB Created: 2021-03-09 00:28:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4b3d5c2318499bd797ddeff5a9ccd5e4 SHA-1: af3d36469e70bbd656212684be57ff7a6eaa11b7 SHA-256: f1437b828bbbadee4df903d4c4a9ac5d45e1eea76f7ce6516f647bb3c02da98f
186 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, suggesting a link farm or spamming operation. The primary URL provided in the document body, 'https://gimoguvi.ru/strik?utm_term=connect+epson+printer+to+wifi+without+wps', indicates a lure related to printer setup, likely to direct users to malicious or scam content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://gimoguvi.ru/strik?utm_term=connect+epson+printer+to+wifi+without+wps PDF link annotation
    • http://wimuzawoxi.getenjoyment.net/stoeger_12_gauge_m3500_reviews.pdfIn PDF document text
    • https://lodarexuxune.weebly.com/uploads/1/3/4/3/134352809/8236970.pdfIn PDF document text
    • https://donabetolemi.weebly.com/uploads/1/3/1/6/131637402/7606910.pdfIn PDF document text
    • https://nofuzibid.weebly.com/uploads/1/3/1/4/131453406/gaxejezokiwow.pdfIn PDF document text
    • http://velixone.66ghz.com/4992414551.pdfIn PDF document text
    • http://wafolepis.iblogger.org/93579844745.pdfIn PDF document text
    • http://wavasesinile.22web.org/37344586118.pdfIn PDF document text
    • http://fitukogamoj.iblogger.org/avatar_tamil_dubbed_movie_1080p.pdfIn PDF document text
    • https://guxofavopadowan.weebly.com/uploads/1/3/5/9/135988616/gudaduni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vimixof.onlinewebshop.net/vabaxowaxawolamokudajod.pdfIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_b45241b05b744cdf8df12c5b174392be.pdf?index=trueIn PDF document text
    • http://duvufewitopemaw.rf.gd/wisexefiketozori.pdfIn PDF document text
    • http://telimagafire.epizy.com/58136628737.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_c5d8e446954840178a2a9353ab3e60f2.pdf?index=trueIn PDF document text
    • http://zamoguwudegovo.rf.gd/android_ndk_build_apk.pdfIn PDF document text
    • http://bubewap.rf.gd/panasonic_plasma_tv_wont_turn_on_8_blinking_red_light.pdfIn PDF document text
    • http://dusutokoj.epizy.com/how_to_set_up_yamaha_receiver_wifi.pdfIn PDF document text
    • http://guneginumo.rf.gd/wafakupikax.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_off0000ddd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD9 4860 bytes
SHA-256: c002c83d841f3b48b5d76cb7623e7dc2a4a1a03c792edf377ee662ba04727b12
font_01_sfnt_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 9988 bytes
SHA-256: f619052d8a8411b8909b218d90b1be033001ee77c26ccad88b356ad325a2a074

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