Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba9d99a091b7d50…

MALICIOUS

PDF

85.3 KB Created: 2021-03-22 02:53:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 95183799f3101a39717cf2924918cd69 SHA-1: 9388ba25ee79d1e3cdf1b858e17ab27895fdc13c SHA-256: fba9d99a091b7d50aaec286af24c256fc71b0c4537f0c3ccd3cf4c3f775e9e6a
136 Risk Score
Tags
free-cdn-ebook-manual-lure

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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://dafemum.ru/wix?keyword=rbt+study+guide+book PDF link annotation
    • http://hurleyshamburgers.com/zunifupixumamapawi037f2.pdfIn PDF document text
    • http://expressday.online/33323072114r2m0b.pdfIn PDF document text
    • http://managerprogram.live/98703031990f9iz4.pdfIn PDF document text
    • http://community-day.ru/judedivogedn5rh.pdfIn PDF document text
    • http://tryraisins.club/90018436184944em.pdfIn PDF document text
    • http://kellys.space/84699816926dyme8.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/debamijizozexo/96680551364.pdfIn PDF document text
    • http://jumesuzev.epizy.com/78080325592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d28aa9e-9603-4fc7-80e9-9779df31b9d8/klipsch_2.1_promedia_review.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/55973921304.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/3530779491.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/colon_cancer_treatment_guidelines_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/32066544906.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/mijigagisakezavumuwajox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/818bc062-cc83-47db-8a74-acae9b6fff39/american_red_cross_help_with_utilities.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/a_touch_of_class_salon.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/gaditozefotomaliz.pdfIn PDF document text
    • http://zapidijerazavot.epizy.com/45024296716.pdfIn PDF document text
    • http://suraweko.epizy.com/22413056779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c172703b-ee59-4073-abf6-8a506514c2d9/xirusetofil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c887810-f58a-411f-a9f8-c3627d5d78c2/how_to_make_scorpius_constellation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/536a64d8-73a9-4d50-88f8-7952fe425373/esio_trot_movie_amazon.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_off00010f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F10 4968 bytes
SHA-256: f91f36c30bb81ae2cc8c107ef39839d01451f1a8f618de0ed43e5f543133a9ba
font_01_sfnt_off0001201f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201F 11884 bytes
SHA-256: 941050abb90e8007559988e4fabb3784c269f0c94ec7a46267a50bf3b3c97a60

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