Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b77b7ea10a683a…

MALICIOUS

PDF

83.7 KB Created: 2021-03-24 15:22:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f8ca7de31aec674d5758a88116f04eb2 SHA-1: 1fd2308ee630c9ebdf0b5baa37e9c4b995b8a3ee SHA-256: 82b77b7ea10a683a3f8f3335aaf7448c4ede3ef9909311a83bf3cc1e41ee162d
126 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, indicating a high likelihood of malicious intent. The document body contains text related to 'Yowhatsapp 2019 for pc', suggesting a phishing or social engineering lure to trick users into downloading a payload. The numerous external URLs embedded within the PDF, many pointing to disposable hosting or link farms, further support this phishing pretext.

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://seumenha.ru/123?utm_term=yowhatsapp++2019+for+pc PDF link annotation
    • https://nodokesomizi.weebly.com/uploads/1/3/4/6/134656280/rajeramekarebeg.pdfIn PDF document text
    • http://vogolimipogusoz.mypressonline.com/95612337907.pdfIn PDF document text
    • http://leadtop.co/20058024420q9qkb.pdfIn PDF document text
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/lenapumot-rinobor-tibevowulepok-jusemeb.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/hampton_bay_ceiling_fan_remote_with_dimmer.pdfIn PDF document text
    • http://lufosopaxukil.getenjoyment.net/cambridge_primary_english_2.pdfIn PDF document text
    • http://gratoramaa.website/lipid_profile_definitionn0w1a.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/nausea_sartre_english.pdfIn PDF document text
    • http://meetsalle.xyz/69165249534ost6r.pdfIn PDF document text
    • http://onlinetiser.website/android_9_samsung_s6_edge_plus92xxe.pdfIn PDF document text
    • https://sezenoxesakibek.weebly.com/uploads/1/3/0/7/130740551/274681.pdfIn PDF document text
    • https://betixajivuf.weebly.com/uploads/1/3/4/9/134900014/vanizamokavoninemuxu.pdfIn PDF document text
    • http://antinomi.design/28902159531e2a52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462732/normal_5ff16743ad7c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_605440bc0bc4a.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/can_you_make_word_dark_mode.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414514/normal_60080c5147e0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mafokesa.onlinewebshop.net/jiwugagewew.pdfIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_3e537570667740d78a18e0df431538dd.pdf?index=trueIn PDF document text
    • http://fanalejowegop.atwebpages.com/ripuxolinuzap.pdfIn PDF document text
    • http://xejobutek.onlinewebshop.net/xuxalegedupoxofag.pdfIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_5bdff00f77fe456180e7952f4bd7c128.pdf?index=trueIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_6664711db1eb4512ae0cdd437aae1e85.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_off000105da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DA 5608 bytes
SHA-256: e721737c300f6cf517a906799d5ff5761b9fa2d5bea262358605001a3b317dc4
font_01_sfnt_off00011903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11903 11512 bytes
SHA-256: 3514b174fcacd60019f0f9dbdc59039dde89ddb3321340e590a0e4e6b388d402

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