Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45f68f81adce3c5…

MALICIOUS

PDF

72.9 KB Created: 2021-02-17 14:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e1382c23a13cf403d2fd4eb84435e0d1 SHA-1: 1ea40ddfbab93261410edb461981d9e596a91fcc SHA-256: e45f68f81adce3c5331d9b42981f5b1363afa58c7d20b7e38cb1368980141b56
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to 'Aroma digital rice cooker recipes', likely to trick users into clicking malicious links.

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://baarspo.ru/strik?utm_term=aroma+digital+rice+cooker+recipes PDF link annotation
    • https://cdn.sqhk.co/rinezodoniga/pgiidJz/fukun.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/cgdhdKY/learn_to_write_thai_app.pdfIn PDF document text
    • http://iceteas.space/golf_hitting_mat_reviewsvn9v4.pdfIn PDF document text
    • http://fragcups.com/jimimazuthjj5z.pdfIn PDF document text
    • https://cdn.sqhk.co/fujonexa/hbVbVbj/61685339285.pdfIn PDF document text
    • http://all-host.site/calories_count_chick_fil_a_superfood_salad38qmf.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/NhcgjR8/53289969152.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/LdPiivL/talisman_game_steam.pdfIn PDF document text
    • https://valuzobuxile.weebly.com/uploads/1/3/2/7/132711949/mowuxow.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/Ihhjxgh/6923694842.pdfIn PDF document text
    • https://cdn.sqhk.co/lijuwezasip/ih3SOhj/doxubedamodebamaka.pdfIn PDF document text
    • https://zoletewiv.weebly.com/uploads/1/3/2/6/132695336/ac2a4af35d141e9.pdfIn PDF document text
    • https://cdn.sqhk.co/mezadisedud/gjijbje/messenger_app_not_working_on_iphone_7.pdfIn PDF document text
    • http://bluebadge-support.com/duet_definition_spanishjh7fn.pdfIn PDF document text
    • http://coolvdomaion.online/subtraction_with_regrouping_worksheets_for_grade_2kt52v.pdfIn PDF document text
    • https://vunukufe.weebly.com/uploads/1/3/4/6/134640969/4038480.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/rewepalazamiso/common_ion_effect_definition_chemguide.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/gaxegepewabij.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/xeforuxelixabozodo.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_off0000de7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7D 5448 bytes
SHA-256: 2ea1154693264bd08d428053cfe44f03f4720d5b698561d0fb209dbe63a04620
font_01_sfnt_off0000f0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EC 11112 bytes
SHA-256: 8824492f7b632cf1e5a8fe9ce125f70bc263d12c92c2b510b2ed869ca3e749e9

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