Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ab359c05ea05e1…

MALICIOUS

PDF

102.3 KB Created: 2021-04-29 04:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8810ab1e7927cb9d986ea24c8a3d1fb4 SHA-1: 18ec4b5fbfe71f8e3eae7bd1a6aa96b7141f4134 SHA-256: 25ab359c05ea05e12ebcb993b3e933452369a85f7822f269529be26328567388
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://maypoin.ru/strik?utm_term=hanuman+chalisa+meaning+in+kannada+pdf+download PDF link annotation
    • https://cdn.sqhk.co/susononuz/bdXjjkq/52826587425.pdfIn PDF document text
    • https://cdn.sqhk.co/wewuxujudu/ZIf3lhi/wasogapegibusuv.pdfIn PDF document text
    • https://wafugavewe.weebly.com/uploads/1/3/4/3/134369352/c519b88.pdfIn PDF document text
    • https://cdn.sqhk.co/kevuviwa/hZQgfic/4029776874.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/IjesFBc/bipuvupoxararo.pdfIn PDF document text
    • https://cdn.sqhk.co/towafeniruje/anKOuif/29448076305.pdfIn PDF document text
    • https://fubewewafipox.weebly.com/uploads/1/3/0/8/130874235/2ec5e9ca92d7.pdfIn PDF document text
    • https://nudilosi.weebly.com/uploads/1/3/4/5/134527742/wemogegoduta.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/Ojjhqid/flixster_video_download_file_format.pdfIn PDF document text
    • https://navuvosukogeguf.weebly.com/uploads/1/3/1/4/131454151/zidagolu_poximusonogu.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/hhj7ic6/trailer_hitch_utv_snow_plow.pdfIn PDF document text
    • https://cdn.sqhk.co/povuguzuloga/jaIfkvc/elder_scrolls_blades_nintendo_switch_controls.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/calyx_point_trial.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/52488825046.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/introduction_to_3d_computer_vision_by_trucco_and_verri_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f91b02d-57ef-4714-8f33-35582dcc576d/roxoxegonodebeladoxox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679b2fc8-b23b-48c5-b333-1010b5db6c60/starting_strength_training_over_40.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/zebovaniwovivisupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8855b8c4-ca7b-4bcc-baf5-2377d6730995/is_pastafarianism_a_real_religion.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/char_broil_4_burner_gas_grill_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/momelajenul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab221f3a-f86b-4537-8e38-11d44ff1cd61/how_to_sue_a_judge_in_federal_court.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/lalizevulozisawuna.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000118af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x118AF 14576 bytes
SHA-256: 7415c3a9986992b399766ca21e426cc55e3049eb2f936224362bc5fe716db18c
font_00_sfnt_off000105ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BA 5592 bytes
SHA-256: 890ebe0843eae5b58a9390f7eda02452458765576f06978840972302f6af5a78
font_02_sfnt_off00013b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B96 14028 bytes
SHA-256: b7044448f9dfd9260e7a79631e76ccb750790330dd3bc7f94025c0537df89699
font_03_sfnt_off000168e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168E9 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
font_04_sfnt_off00017e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E3C 3044 bytes
SHA-256: 1f202d292d2dc9d28527fc9f06df0b31bdfa9d91088c5945b7be94c358084a9f