Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f5a76ca8eaa18d7…

MALICIOUS

PDF

77.8 KB Created: 2021-02-15 01:50:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 44b6102debd8012561b7b32cd9534968 SHA-1: 8aae3b8b2506adbddd1b797f41a75fc91714b7c5 SHA-256: 7f5a76ca8eaa18d7dbc622da54f503402d8019f24f5cacf982b490eb22284a64
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://jottigo.ru/aws?utm_term=bisection+method+tutorial+pdf PDF link annotation
    • http://bitsracing.net/research_proposal_sample_applied_linguisticsnk98m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388814/normal_5fc664e9ed1dc.pdfIn PDF document text
    • http://zootime.store/pubimumawazakirabaz5fg48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446015/normal_5fd7ce6a8cd00.pdfIn PDF document text
    • https://dukinuvofipul.weebly.com/uploads/1/3/2/7/132711936/fa0e1d7bb261696.pdfIn PDF document text
    • https://zukikopan.weebly.com/uploads/1/3/0/7/130775822/guxajapokiwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450047/normal_60253a1f0632a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489976/normal_600e53f0aad39.pdfIn PDF document text
    • https://patobusogeziwe.weebly.com/uploads/1/3/4/0/134096506/kutuv.pdfIn PDF document text
    • http://tipografiyav.moscow/zujarokogezabozewezuwmwbpr.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/hNhh2gd/gijapixevuxobejamiwoler.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/sivanira/marvel_future_fight_uru_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/amended_form_1041_mailing_address.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/1942053330.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/california_zephyr_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/nokazixumuzogi.pdfIn PDF document text
    • http://dabevejef.rf.gd/high_level_requirements_template.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
    • 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_off0000d9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B3 5444 bytes
SHA-256: afed0dd129fb0ce5fa2bc1d363565caff1f94462e34c21b78ddea0c8bfb407d5
font_01_sfnt_off0000ec0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0B 11840 bytes
SHA-256: 5b69a33484305afe366273877832028985c15ad7e3a0863a6c509b75a688d39c
font_02_sfnt_off000114b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B8 16144 bytes
SHA-256: f7282090e270060608fdc575ded0b184a97243f724fc845514d2e81390c10c7f

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