Malicious PDF — malware analysis report

Static analysis result for SHA-256 78173ccb18c44e55…

MALICIOUS

PDF

76.1 KB Created: 2021-03-24 07:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 022ff98b449980bb037fbea2775ef160 SHA-1: 99f79ce013a203c746c8f33e0b01146d4f38cfcc SHA-256: 78173ccb18c44e553eb66033403d99d9bbe76979af1c7f4d69c9a2cae4a1fefa
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an external URI pointing to a URL that appears to be a lure for downloading a malicious file, disguised as a repair manual. No scripts were extracted, but the presence of external URIs and the nature of the detection suggest a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=1974+vw+beetle+repair+manual+pdf+free PDF link annotation
    • http://bepajizijuxiz.iblogger.org/26498133369.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/navomudop.pdfIn PDF document text
    • http://pubggaming.online/vexixemejezitolunokuzpc8bh.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/amoxicilina_500_mg_bula.pdfIn PDF document text
    • http://goodshopsales.xyz/67521384037185dx.pdfIn PDF document text
    • https://rubuvewoxuvima.weebly.com/uploads/1/3/4/8/134873715/a46402d9.pdfIn PDF document text
    • https://xidalivukudupet.weebly.com/uploads/1/3/4/3/134319957/bexunugotonu.pdfIn PDF document text
    • http://tejafosiko.iblogger.org/california_king_fitted_sheet_measurements.pdfIn PDF document text
    • http://photoforce.ru/sikubaxuplk7x5.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/8524818.pdfIn PDF document text
    • http://differencecheats.net/5023875441a1mct.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_e198c41bb61b4a748ed33ff867fc38e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gogunabones/7081159269.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/brick_by_brick_book.pdfIn PDF document text
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_f179e3526fb845c2877e46b9adcbc742.pdf?index=trueIn PDF document text
    • http://mabobasator.epizy.com/abducting_the_outside.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/bolakoworiwisarufaberikom.pdfIn PDF document text
    • https://ddd90330-5837-4e0c-b2f6-9383941cd2db.filesusr.com/ugd/568e2c_325e88a1f44f4d19b81d48196e8fb261.pdf?index=trueIn PDF document text
    • http://zoxirebetezeguz.epizy.com/automate_the_boring_stuff_with_python.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/practice_6.1_classify_angles_worksheet_answers.pdfIn PDF document text
    • http://tiwomabot.rf.gd/tizafagabebavug.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/wakedosekalokiwakadi.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/wepilejow.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_off0000eb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9E 5580 bytes
SHA-256: 46ca76865bd1bf66b94dfea7202732d6f497bd2cbf8eeea0b76c6d0e8296b67f
font_01_sfnt_off0000fe9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9F 10892 bytes
SHA-256: d34168af7f20fc4b9e7f86763fe58d381ca03a4dc0cadc176cd2195cd74e55f3

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