Malicious PDF — malware analysis report

Static analysis result for SHA-256 2461ae9943b135d0…

MALICIOUS

PDF

80.8 KB Created: 2021-03-12 06:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 73a4f504a4251ac11da671fdabafc5cc SHA-1: 8831bb48e01ddcd581d92b89d78da98cfefec8b2 SHA-256: 2461ae9943b135d07978fff90b8217aaa995fb32fb1b96d185f0d058b9eb3b15
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the heuristic PDF_SEO_LINK_FARM strongly suggest the document's purpose is to redirect users to malicious sites.

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 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.
  • 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://zajinet.ru/123?utm_term=aroma+rice+cooker+manual+6+cup PDF link annotation
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/manepipe_xazanuxobife_jujakaja.pdfIn PDF document text
    • http://donbetosstreettacos.com/33166766093h4yem.pdfIn PDF document text
    • https://vupolape.weebly.com/uploads/1/3/4/7/134749420/ganogi.pdfIn PDF document text
    • http://bloomwithdeanna.com/acrobatic_gymnastics_classes_near_meld39r.pdfIn PDF document text
    • https://polavimiwusirew.weebly.com/uploads/1/3/2/6/132681763/nokidim.pdfIn PDF document text
    • http://fresh-ita.space/how_to_add_fonts_in_wixcqfqa.pdfIn PDF document text
    • https://sixobeludid.weebly.com/uploads/1/3/5/2/135298518/9017037.pdfIn PDF document text
    • https://tavabaxo.weebly.com/uploads/1/3/1/0/131071290/jumufumiwuzuni.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/zebarufuridorur/tozatiborisuvaxazanexud.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/find_control_in_listview_itemtemplate_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e54787c7-13ca-4b39-8f1f-874de0b273eb/how_do_i_write_about_my_favorite_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/687005e4-980b-4556-aa52-a9d978a4c29d/how_to_print_without_replacing_color_ink_epson.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/is_canon_pixma_ts3322_compatible_with_chromebook.pdfIn PDF document text
    • http://letekafot.rf.gd/can_you_manifest_a_specific_person_to_love_you.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/50651899631.pdfIn PDF document text
    • http://tojepulevuzowu.rf.gd/gapukodozovibulesav.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/pemerogukapefuwuniv.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/abs_cbn_news_reporter_names.pdfIn PDF document text
    • http://bekepijamewevo.epizy.com/anil_kapoor_judaai_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/pneumatic_hand_tools.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_off0000fcb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB5 5108 bytes
SHA-256: 622f2ea8f0ad1261c1b20293c15d3a2154e7a9c3baa351e32c5d4e90be32957d
font_01_sfnt_off00010dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFF 12056 bytes
SHA-256: 7111ec2f82d51bd19871bb4310c7638bbe331b84a9562827356697b4ce7d5df9

Open this report in the interactive analyzer, or submit your own file for analysis.