Malicious PDF — malware analysis report

Static analysis result for SHA-256 dede2ee69fa839ec…

MALICIOUS

PDF

81.3 KB Created: 2021-03-16 03:59:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 971f8d5449514f2dfd0e4dbf7cdd4dd5 SHA-1: 56a5c77cb45e9d39305e97bc8ba941315ed8b68d SHA-256: dede2ee69fa839ece410df67bec198748e5095065a9dc4f4bb58e29d3ff412b3
136 Risk Score

Malware Insights

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

The PDF contains a link to an algorithmically generated URL, which is a common tactic for phishing and malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. The document body, though partially corrupted, suggests a lure related to searching for lock pick sets, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://dafemum.ru/strik?utm_term=does+home+depot+sell+lock+pick+sets
    • http://tawesukosipot.22web.org/camelot_season_1_english_subtitles.pdf
    • http://privateguardingserviceagainstdanger.site/zunaxebinesenupamili0m6jb.pdf
    • http://barberking.best/what_makes_a_good_public_speakerwb58v.pdf
    • http://lnstagram-blue-ticks.com/89122073274ngmbq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bekugasil.rf.gd/abominable_putridity_album.pdf
    • https://uploads.strikinglycdn.com/files/8fffb5c0-cb8b-4b3a-983a-b4ce3ff84aeb/the_bitcoin_standard_audiobook_free_download.pdf
    • https://s3.amazonaws.com/befafuni/adobe_photoshop_touch_free.pdf
    • https://s3.amazonaws.com/vebenok/witatisibukaroru.pdf
    • https://s3.amazonaws.com/lebejos/jupeniveti.pdf
    • http://dotejujuzobok.rf.gd/what_is_the_meaning_of_free_will_offering.pdf
    • https://s3.amazonaws.com/tuzakifezara/dozawigamu.pdf
    • https://s3.amazonaws.com/rakabexozu/25973129770.pdf
    • http://pafixorofabeza.epizy.com/battlefield_4_free_highly_compressed.pdf
    • http://gizimup.epizy.com/tobafasifoludiferi.pdf
    • https://uploads.strikinglycdn.com/files/fa1850c5-71e5-4218-91ad-6759aea81d74/71790012293.pdf
    • https://s3.amazonaws.com/somamere/columbus_dispatch_voters_guide.pdf
    • https://uploads.strikinglycdn.com/files/6de56875-104a-4060-95fe-997550816cac/29490715356.pdf
    • https://s3.amazonaws.com/jarirotexab/photography_invoice_template_google_docs.pdf
    • http://fakujijaxubet.epizy.com/dolujofovelug.pdf
    • https://s3.amazonaws.com/tuzamada/circular_motion_class_11_notes.pdf
    • https://s3.amazonaws.com/kozewuposoridil/29615603769.pdf
    • http://galojuxutiwas.epizy.com/beluvufoxim.pdf
    • https://uploads.strikinglycdn.com/files/fda7a713-5736-467b-be52-98f04f1468f3/john_deere_l130_transmission_oil_change.pdf
    • https://uploads.strikinglycdn.com/files/d26878c1-f3f6-4fd7-8115-d4f7047a2edd/ziritisunixupasujekelim.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe4e.bin
f355a03aaa052a127f72658728ac35c37660b8e5003842cdf570b9d29fbd6667		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4E 5072 bytes
font_01_sfnt_off00010f72.bin
81e0013847dd2f647373dc0158a3e9b26e53834d3788cb22a3593d25cb48f752		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F72 11228 bytes

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