Malicious PDF — malware analysis report

Static analysis result for SHA-256 78cddc5733249ad4…

MALICIOUS

PDF

75.0 KB Created: 2021-03-24 22:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74ad74a2ab2b09b8c29fd650b5bd2956 SHA-1: 9e9418c874403dca7d49bbe692c3dbaa32441c73 SHA-256: 78cddc5733249ad4f7126580b83f68ec3712a2be03b84031dfcb571569ed9eea
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO poisoning and phishing. The primary URL, 'https://golowaki.ru/wix?keyword=lspdfr+search+warrant+not+working', suggests a lure related to law enforcement, likely to deceive users into clicking. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/wix?keyword=lspdfr+search+warrant+not+working
    • http://vibijinit.scienceontheweb.net/71933241715.pdf
    • https://ximavubakalik.weebly.com/uploads/1/3/0/7/130776508/voribugixuw_turafonizuwad_sixufes_sufijarimetem.pdf
    • http://tonevagewalilu.medianewsonline.com/dojejofovunobiroguwitov.pdf
    • https://tepewumulu.weebly.com/uploads/1/3/1/3/131384412/rexurefurixoninu.pdf
    • https://cdn.sqhk.co/wixadigizal/je6ibPo/66078349216.pdf
    • https://tebojizo.weebly.com/uploads/1/3/1/4/131406069/zakudirugo.pdf
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/07640c.pdf
    • https://cdn.sqhk.co/lumonapopedi/iaYCuna/plenty_of_time_song_sheet_music.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b1080901-57ef-48b2-b1c2-61a5df4be384/dupizurod.pdf
    • https://uploads.strikinglycdn.com/files/8607facf-6823-4a07-afcc-16d34cd688f7/58906493813.pdf
    • http://vovakupalujum.onlinewebshop.net/14281475293.pdf
    • https://uploads.strikinglycdn.com/files/899076ca-3e74-4660-9e1f-158a0a4a834d/simple_past_irregular_verbs_exercises_text.pdf
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_39aac4171d1e418994013933d7e56049.pdf?index=true
    • https://uploads.strikinglycdn.com/files/95fc6ed7-106f-4f6d-ab46-20f632b2421c/92204933484.pdf
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_c9c31aae9bce4dc4b29d49945e86365b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6107ecd1-c8b2-4894-939a-ea00710e0205/92995160235.pdf
    • https://uploads.strikinglycdn.com/files/0cb0b538-98f1-46f7-8858-0272dcaa9fc8/53506848374.pdf
    • https://uploads.strikinglycdn.com/files/fca72e62-2e58-4ea4-9418-05518247aff2/mens_hairdressers_open_today_near_me.pdf
    • https://uploads.strikinglycdn.com/files/24e634fa-6165-4561-8cc7-e100eded2539/omron_h3cr_manual.pdf
    • https://uploads.strikinglycdn.com/files/fe61db63-21a9-4613-b5f2-a1a0c75a2dee/46784704184.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_off0000e593.bin
a0f9a05c08909ba6a41a46ff89fe23c649797d69ed8811ddafd09d53fe840bd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE593 5480 bytes
font_01_sfnt_off0000f851.bin
fdbdf0fab9a841350714bcdeebacd8ab5ab35eb2fa76d1af3b6d117a1ae4ae30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF851 11384 bytes

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