Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a647f6e9ebddf1…

MALICIOUS

PDF

82.5 KB Created: 2021-03-24 23:19:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 21073ba4187fd9741471005a8c7e8c8e SHA-1: 5a371a14d4d19592a451031ae38dd5493cd19e2b SHA-256: 22a647f6e9ebddf102331fae7770e4313f59b01ad25f870eaeaaadd7d7ff3b1b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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
  • 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://gimoguvi.ru/wix?keyword=stoichiometry+enthalpy+and+heat+worksheet+answers PDF link annotation
    • http://kuliwegi.sportsontheweb.net/55830392496.pdfIn PDF document text
    • http://benivosefemiza.medianewsonline.com/bible_niv_download_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/227f6178-ca5f-4833-85a1-7f08dad7390c/what_size_light_bulb_for_oven.pdfIn PDF document text
    • http://wozaxanakix.epizy.com/erbe_vio_300s_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/favanenalolobesezigedew.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/nodazupinajinoxaxibexo.pdfIn PDF document text
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_089ae65fd10643f5a9d826077a26c514.pdf?index=trueIn PDF document text
    • http://nabotiwufonego.epizy.com/42392896718.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/sears_sewing_machine_model_385_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ed6cbbe-ff10-43f7-839e-bac986d5f3e4/99706885454.pdfIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_c15e0d12e4db4a1591092959f2d156ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/resumenes_guerras_carlistas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/929dab13-a602-4beb-9dc3-2751c7066825/yes_man_jumper_song_lyrics_third_eye_blind.pdfIn PDF document text
    • http://zobawukesilebaf.epizy.com/zifasovefelawiw.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/old_paper_powerpoint_template_free.pdfIn PDF document text
    • http://puriruf.epizy.com/84096561202.pdfIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_01ce833cf3cb4924bfa05b781f917e8b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc0a7bf0-91f8-47ac-b57d-8427371abd2d/what_is_noble_in_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/gezudu.pdfIn PDF document text
    • https://57ead060-d7b3-4f59-a803-6c9b47c0028a.filesusr.com/ugd/f30481_83c0e0c8c7254cc9b8f031157039e864.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/bigifemutena.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED2 5676 bytes
SHA-256: 3485b66caf25f3845a3b3a7f1a7f1e13a6a85e0112554445f28282a38065e2eb
font_01_sfnt_off0001020e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020E 10756 bytes
SHA-256: 76c21883f8c31b17548e04f4535e926f9626add603f645e9b4fb52fc84acf1b2
font_02_sfnt_off0001272c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272C 16128 bytes
SHA-256: 9876d0897ec9c8daf800546b62de215c972fdd6e45e85ac3a8ec620a70dbc6f8

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