Malicious PDF — malware analysis report

Static analysis result for SHA-256 07422b29b394b10c…

MALICIOUS

PDF

78.8 KB Created: 2021-03-28 08:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7af7a6be4a257464d58b939c9bca7fac SHA-1: 7f5e1fd5e55ad13569b5fd34b62802e3bf6011a1 SHA-256: 07422b29b394b10c3fb2fe808999c61e3b54b0edefc117ebc94d9ffe0ddfd733
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, likely for phishing or malware distribution. The ML classifier and ClamAV detection further support the malicious verdict. While no scripts were explicitly extracted, the nature of the embedded URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xajibur.ru/strik?utm_term=how+do+i+pray+for+my+husband+and+marriage PDF link annotation
    • https://wigazasadus.weebly.com/uploads/1/3/5/9/135974004/sufemolisasazu_movifasudegif_nitewiwelasot_zizon.pdfIn PDF document text
    • http://familyit.pro/english_grammar_exercises_online_for_beginners6j7z9.pdfIn PDF document text
    • http://palopej.sportsontheweb.net/97694728929.pdfIn PDF document text
    • http://lumejaramelu.mygamesonline.org/pulufumufomiganuriz.pdfIn PDF document text
    • http://sportplays.ru/how_do_you_put_a_plantronics_bluetooth_in_pairing_modez8tsz.pdfIn PDF document text
    • http://bbflowers.net/917174275382f6n7.pdfIn PDF document text
    • http://penexej.mywebcommunity.org/vafabotoxetuveken.pdfIn PDF document text
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/sijuj.pdfIn PDF document text
    • https://gorixekaliwe.weebly.com/uploads/1/3/4/4/134439057/misom_fegapamebos.pdfIn PDF document text
    • http://best-ital.fun/30166632379mzwxw.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/what_does_the_book_of_enoch_say_about_jesusjhcbq.pdfIn PDF document text
    • http://buloshnaya.site/enthusiasm_tamil_moviesk0r9h.pdfIn PDF document text
    • http://clientesdkb.com/besolivivereng71lm.pdfIn PDF document text
    • http://wovuwukotuvoxi.mygamesonline.org/how_to_use_wildgame_innovations_sd_card_reader_for_android.pdfIn PDF document text
    • https://wadasowodasi.weebly.com/uploads/1/3/5/3/135316150/ximikevaridewul.pdfIn PDF document text
    • http://takaweri.mywebcommunity.org/pyramidal_tract.pdfIn PDF document text
    • http://azorocheat1.xyz/54885410250xz8so.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/dream_of_the_rood_line_by_line_translation.pdfIn PDF document text
    • http://deutschebank-meine.com/how_to_reset_apple_homepod_to_factory_settingsexyjl.pdfIn PDF document text
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/4340617.pdfIn PDF document text
    • http://jilet1.club/143896935261ww.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muzulozak.atwebpages.com/what_is_a_legal_opinion_letter.pdfIn PDF document text
    • http://zaduzos.myartsonline.com/xajalerezusavebovapejas.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_off0000f744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF744 5720 bytes
SHA-256: f8dddbb0069b30c75e9ed5468c9e86a833bbe34837b43adaa0c63acc441dd2d1
font_01_sfnt_off00010aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA6 10216 bytes
SHA-256: 3b64a00aa351d47a8403206b3756f0335da74f7a1db439f7c41059d0956f2ef5

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