Malicious PDF — malware analysis report

Static analysis result for SHA-256 8545a5df34bddb93…

MALICIOUS

PDF

72.0 KB Created: 2021-03-23 05:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f7cadd484a6be6b83728f75c19eeeeb3 SHA-1: 9ed2d25eba9ebc223ddc414ce94c8b76fa2d863d SHA-256: 8545a5df34bddb939241417beb8a8975ecd67d0cb0b9b8d08345f5258a68733c
156 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. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=magpie+lab+student+guide+answers PDF link annotation
    • http://nigavereke.mygamesonline.org/hp_laserjet_1320n_printer_cartridge.pdfIn PDF document text
    • https://balesiloruj.weebly.com/uploads/1/3/4/6/134671801/7133463.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/aiaOdij/32317710707.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/r2xAiag/virus_hunter_2020_apk_que_es.pdfIn PDF document text
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/kudikawano-viligu-ravebevexus-dasun.pdfIn PDF document text
    • https://cdn.sqhk.co/razefudixid/WGficig/bugefavugevovovajifu.pdfIn PDF document text
    • http://kegetisa.mygamesonline.org/termodinamica_cengel_download.pdfIn PDF document text
    • https://ketizinuxemuwiw.weebly.com/uploads/1/3/0/9/130969628/9377988.pdfIn PDF document text
    • https://lewumirobubav.weebly.com/uploads/1/3/4/7/134762292/4510737.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/moduxanakuri/arijit_singh_sad_song_bestwap.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/2011_craftsman_gt_6000_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/candy_crush_apk_mod_ios.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_3da7e3896e9544ad82c4caee306f073c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mudurixo/kugavedepunisu.pdfIn PDF document text
    • https://cc67bef4-e22e-42fd-bf01-3f02b15f800b.filesusr.com/ugd/080020_b5981f2d12dd4c61ac64f56f8441c446.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dukajevo/36018815996.pdfIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_83ca0e59e5924f44952f1e6504a9394c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zopenave/subject_and_predicate_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/tesco_pet_insurance_ongoing_claim_form.pdfIn PDF document text
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_ef78bcf183a4461c86f9674b36193dd6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tofizo/difference_between_normalizing_and_annealing.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/biotechnology_genetic_engineering_information.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_off0000da13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA13 5364 bytes
SHA-256: 460becd3a2a6d16d8453d3e793b9934630e4c40aa728e209bfb4a6f9c24feb9a
font_01_sfnt_off0000ec73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC73 11208 bytes
SHA-256: 3ec78bf263413d2c23c394c926d4c3f6a5d4da295ded9e93787e062a6cef5a2c

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