Malicious PDF — malware analysis report

Static analysis result for SHA-256 2187a7b8e87511a7…

MALICIOUS

PDF

74.4 KB Created: 2021-04-04 09:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a71d798718f9d2968b38b1c62063a297 SHA-1: 7d108b4d371212002ddb98eb1ed9acf722700d0c SHA-256: 2187a7b8e87511a73c014ad30720239078a7498f916ebda124ac74cbd2c4c7bf
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous external links, with a primary URL pointing to 'gimoguvi.ru', suggesting a phishing or malware distribution lure. The document body, though partially corrupted, contains text related to 'Spirit airlines carry on bag size and weight', indicating a potential social engineering pretext. No scripts were extracted, but the presence of external links and the overall detection profile strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gimoguvi.ru/strik?utm_term=spirit+airlines+carry+on+bag+size+and+weight PDF link annotation
    • http://vehicleusains.com/17870488719sjrnt.pdfIn PDF document text
    • https://cdn.sqhk.co/dujagazatad/hjcDji8/amazon_alexa_echo_show_2nd_generation.pdfIn PDF document text
    • http://nafesotarun.22web.org/what_is_notes_on_camp_about.pdfIn PDF document text
    • http://megantv.site/5860724379litke.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafepel/cCig2fj/guess_the_picture_quiz_ppt.pdfIn PDF document text
    • http://twirlini.com/riximizafa6stl3.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/TifMqid/redexepekoxerowiwalajaf.pdfIn PDF document text
    • http://helplnstagram-confirm.com/a_mouse_tale_20157kmwc.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/tadalatujoxa1jlbp.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/farokof/is_onyx_durable.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/crochet_afghan_stitch_youtube.pdfIn PDF document text
    • https://6e678f60-abc6-404c-883a-cd1729fdffee.filesusr.com/ugd/e4291f_ad7c9ee41c0d457ea9c6a933dec32d62.pdf?index=trueIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_8f12aa5dc23543baaa2fd441bf398034.pdf?index=trueIn PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_4a3f447148f04896a558ac86ffbe858b.pdf?index=trueIn PDF document text
    • https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_966f2dba69f1457b874eecb0bca215bc.pdf?index=trueIn PDF document text
    • http://fafinonez.rf.gd/96576540904.pdfIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_c49dfdaaeba44211afc89ca013d73424.pdf?index=trueIn 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_off0000e165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE165 5820 bytes
SHA-256: f77e590ccba1bdbbd8e31d156ff803c6b1b433d2e4a16df6a111a241f88a63aa
font_01_sfnt_off0000f53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53F 10920 bytes
SHA-256: b53860fd2a4b23b621a4d914561a71a33e81b788af628446e2195e32052e133c

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