Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8880012f05eba5…

MALICIOUS

PDF

73.3 KB Created: 2021-03-23 01:34:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 81703578da928606f5d19d84ca55843b SHA-1: 661ef6c421893a90a3604ff85fba537b7d112273 SHA-256: ab8880012f05eba5d2e186b72e43b7a4fc0e5939b2edbb80c7c2c130d24afcef
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains references to 'G shock resist 3232 manual' and 'wkhtmltopdf', indicating a potential lure to disguise malicious intent. The presence of external URIs and link farm characteristics strongly suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/aws?utm_term=g+shock+resist+3232+manual PDF link annotation
    • https://bitipobigexu.weebly.com/uploads/1/3/5/3/135399459/pazirekakatuwojazul.pdfIn PDF document text
    • https://rujijixagav.weebly.com/uploads/1/3/1/3/131383475/11ddab794ee39ba.pdfIn PDF document text
    • http://netlysy.online/sutogorobefexuj0z63i.pdfIn PDF document text
    • http://smartradiobf.ru/10912471983w4z7m.pdfIn PDF document text
    • http://kkkirrreeee.space/torugk1c05.pdfIn PDF document text
    • https://gepadagonuvo.weebly.com/uploads/1/3/0/7/130775626/cc9ffe0.pdfIn PDF document text
    • https://cdn.sqhk.co/libidexa/PfihFhf/mevuwazutorafutubetewiri.pdfIn PDF document text
    • http://shop-kid-toys.online/82170545520lmlcb.pdfIn PDF document text
    • http://shishkin-seed.xyz/rumble_in_the_jungle_pairing_crosswordvu66c.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaso/c5iixoc/commuters_definition_in_arabic.pdfIn PDF document text
    • http://vamolufu.getenjoyment.net/52924887846.pdfIn PDF document text
    • http://job-finder.space/palomeramutadebof5l7ec.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
    • http://fegugeg.rf.gd/lofuwujilepa.pdfIn PDF document text
    • http://bidilud.rf.gd/vawebukedenazezajipul.pdfIn PDF document text
    • http://gusubozavagu.epizy.com/87029527560.pdfIn PDF document text
    • http://gubawakelu.onlinewebshop.net/87781359676.pdfIn PDF document text
    • http://zunuwovadete.epizy.com/wepiginofujezoboxiza.pdfIn PDF document text
    • http://xutenujute.myartsonline.com/fifuzimugibefesux.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C4 5312 bytes
SHA-256: 3a15cd94ebc4e737dd6a31fb9cb1fc6a8bd35acc5b7100ccc3e6009bac80253b
font_01_sfnt_off0000e6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A5 10444 bytes
SHA-256: a5f59b4e3cac75ee0396d4d1728baec962339bc082012b3f552b7202e1f5061d
font_02_sfnt_off00010a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A23 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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