Malicious PDF — malware analysis report

Static analysis result for SHA-256 992bcb1307307b45…

MALICIOUS

PDF

85.9 KB Created: 2021-04-03 14:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 800ab3b839d1fa5a465fc68c2fdb24c9 SHA-1: b0f25750779f059d7ed382a3cb7979c303d14fd4 SHA-256: 992bcb1307307b455028531b9dce0c536e009c703e9dc9977bc261569a61ad87
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many of which point to other PDF files, suggesting a link farm or distribution network. The embedded URLs and the PDF structure indicate an attempt to direct users to potentially malicious external sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/award?keyword=jurnal+adiantum+sp+pdf PDF link annotation
    • https://kosefunoz.weebly.com/uploads/1/3/0/7/130775186/nubif.pdfIn PDF document text
    • https://juputifewusa.weebly.com/uploads/1/3/4/4/134435955/3564193.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/mesarumep.pdfIn PDF document text
    • http://catsism.com/mumepuxasapexujupizuzefog72qko.pdfIn PDF document text
    • https://fasanubuxa.weebly.com/uploads/1/3/4/7/134733786/d61348d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416792/normal_604e0a8d8e455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369794/normal_5fdac068d4e34.pdfIn PDF document text
    • https://tetiwaxope.weebly.com/uploads/1/3/0/7/130776033/birage.pdfIn PDF document text
    • http://pl50off.info/77020330493saita.pdfIn PDF document text
    • http://megahit.space/arjun_the_warrior_prince_movie_freeldzmm.pdfIn PDF document text
    • http://trackcreditscore.info/moo_business_card_template_illustratorm0lw2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_5fe88d3c4e85d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458622/normal_601b7ac4c4cf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488102/normal_6006b772d95b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_94bcd0b883b04fd5973793a4bf8301cb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sizabo/66458979033.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/how_to_prepare_for_advent.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/vopopimagikasufufamuwisix.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/september_love_lang_leav_epub_free.pdfIn PDF document text
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_4c54eb5b5dee46e087cc8506fe629913.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fogibi/24505062306.pdfIn PDF document text
    • https://6558ac43-984d-4e3a-97a1-dec8860611ed.filesusr.com/ugd/c73740_1c0536f38a794393b9d9f024abb67210.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_30425bbebe0440d5960a7fe2d3bd0b70.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
    • 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_off0000fd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5D 5176 bytes
SHA-256: bebcec7d4acb78d854025b980a4404d17f0a0c3fb90b45be6cab82978854a4a2
font_01_sfnt_off00010ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE3 11164 bytes
SHA-256: 214a0e25552e065d5c31a4cfb375d69a8c35f189d1a3ede1a0615be66c9dd803
font_02_sfnt_off00013441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13441 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

Open this report in the interactive analyzer, or submit your own file for analysis.