Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9edabecdcece66c…

MALICIOUS

PDF

74.7 KB Created: 2021-03-30 05:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4118a294e0adb6f55267b98934ce26bd SHA-1: 9522c616c4d026221c3fdc3c7cb3c18924e92f23 SHA-256: f9edabecdcece66c7ccf3271bfd8cfd4dbcc8b5e590462480414d7fed11dfd84
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic to direct users to potentially malicious content. The primary URL, 'https://maypoin.ru/award?keyword=fundamentals+of+plasma+physics+j.+a.+bittencourt+pdf', is likely part of this scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://maypoin.ru/award?keyword=fundamentals+of+plasma+physics+j.+a.+bittencourt+pdf PDF link annotation
    • http://kafujaguvo.mygamesonline.org/55573420200.pdfIn PDF document text
    • https://cdn.sqhk.co/wemopizajazo/hggjfhc/17846626793.pdfIn PDF document text
    • https://cdn.sqhk.co/vekosozob/gfLxdja/nosopaxasedutumixop.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/jdDsjcn/inorganica_chimica_acta_author_guidelines.pdfIn PDF document text
    • http://sakivometo.medianewsonline.com/44404844192.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/icgg6iZ/68487146935.pdfIn PDF document text
    • http://birapemotafew.mygamesonline.org/grammaire_orthographe_franaise.pdfIn PDF document text
    • http://xeniveperovabef.sportsontheweb.net/abzurdah_completo_descargar_gratis.pdfIn PDF document text
    • http://fajasated.mywebcommunity.org/how_do_i_pickup_my_walmart_grocery_order.pdfIn PDF document text
    • http://manamuposa.getenjoyment.net/career_counseling_questionnaire_for_students.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_02e76b740a8d49798a9591c71aa2dae0.pdf?index=trueIn PDF document text
    • http://wolobugoxew.myartsonline.com/samsung_dv45h7000ew_a2_service_manual.pdfIn PDF document text
    • http://balesalefune.epizy.com/suvotaxivewoxodod.pdfIn PDF document text
    • https://cd65756b-a9c7-4cca-9498-1747a6459195.filesusr.com/ugd/05eb20_5f182f8d663a4ec2a2f9d0806407c377.pdf?index=trueIn PDF document text
    • http://fisetefukuwod.rf.gd/ice_white_outdoor_icicle_christmas_lights.pdfIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_4157835412824170961ce43764392c70.pdf?index=trueIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_8300321dbb0c48bdbf9124264e8a069b.pdf?index=trueIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_6c032c3868554b79aec150c351e90a5c.pdf?index=trueIn PDF document text
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_d751fc34dcdb45518ba3b4dbb60b555e.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_e0c9ac108a214390a53af7ae8eef9506.pdf?index=trueIn PDF document text
    • https://32e47638-7206-44c1-ad53-5c6f9176402e.filesusr.com/ugd/e00742_398933517c44437e80841d879eb9309e.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001019f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1019F 17832 bytes
SHA-256: a19217670463e9aecc44fee8f7894e966fbe244c4a61ae1766f60427c44a6336
font_00_sfnt_off0000cc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC23 5700 bytes
SHA-256: 382855439a01298deaa8b0814e4557190bfcbddedbcf443e9480660a68efa8c5
font_01_sfnt_off0000df6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6A 10044 bytes
SHA-256: a6589345d1dad0b18fd36fc021c0b3afbcd57d6fa5ab8dbd8f327cb7fa1996a1

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