Malicious PDF — malware analysis report

Static analysis result for SHA-256 847e6d9547598024…

MALICIOUS

PDF

78.4 KB Created: 2021-03-24 05:18:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: cc853a6f3166f668cd23a50e9a8fd87e SHA-1: fc1df3c92ad5f126e3c8307ae4559c514fc364b9 SHA-256: 847e6d95475980241372024b6ed8d1a0a5a21e5a0d359659f660b4a07fcdeebe
226 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to various external PDF files, many of which are likely malicious. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document likely instructs the user to provide a password for an archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://midufefew.ru/award?keyword=online+extract+rar+file+to+pdf PDF link annotation
    • https://fuguweraxawu.weebly.com/uploads/1/3/4/6/134684603/084c1.pdfIn PDF document text
    • https://disovipogazita.weebly.com/uploads/1/3/1/3/131398104/2203979.pdfIn PDF document text
    • https://wuluruvujomokax.weebly.com/uploads/1/3/5/3/135349857/3e7b6f4115b6.pdfIn PDF document text
    • http://gijejidil.22web.org/nosubofadadadux.pdfIn PDF document text
    • https://jolesebadula.weebly.com/uploads/1/3/0/7/130740242/nejugosuzinukifas.pdfIn PDF document text
    • https://sajurewuvow.weebly.com/uploads/1/3/4/0/134042423/6190537.pdfIn PDF document text
    • https://nilozirarita.weebly.com/uploads/1/3/4/4/134463528/maxowanud.pdfIn PDF document text
    • http://fesadivu.iblogger.org/talufovewekewuv.pdfIn PDF document text
    • https://waziketezu.weebly.com/uploads/1/3/4/6/134648841/senuramifezog.pdfIn PDF document text
    • https://toxupenowa.weebly.com/uploads/1/3/4/0/134042648/nilivatogirusew.pdfIn PDF document text
    • https://ziziwatir.weebly.com/uploads/1/3/4/7/134713039/2932934.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guwibigebozodeg.rf.gd/56601546494.pdfIn PDF document text
    • http://kafopazam.epizy.com/12911360140.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/12200813850.pdfIn PDF document text
    • https://6b21c484-99f8-4e97-b77a-b77c054bfe5d.filesusr.com/ugd/f139d4_8050039962b949ec9b0bcd2d921c49c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/gixumamogigeb.pdfIn PDF document text
    • https://53ee2ee6-42da-4c96-954f-60f726bc8d53.filesusr.com/ugd/de2744_748c95d19dbf4be0bab5d4257a12d417.pdf?index=trueIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_26d3b495139044d686c3090aab5a4efb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/wow_classic_feral_tank_leveling_guide.pdfIn PDF document text
    • http://wipovevoliku.epizy.com/gokiwajetogefef.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/38426125644.pdfIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_d82b2d330f5d476aa50dc30d0969ed56.pdf?index=trueIn PDF document text
    • http://wewiligeva.epizy.com/8619477266.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C3 5068 bytes
SHA-256: d9b9ecbaa633476d3b4ff4bc532bebbffa8f68bdd2a1adfe573b99770f7cb04e
font_01_sfnt_off00010816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10816 10436 bytes
SHA-256: 0f284a85d738eb240e186358465ccc3d7910a46c25ce70606051f7897a58d30f

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