Malicious PDF — malware analysis report

Static analysis result for SHA-256 43a15de116cfd2b6…

MALICIOUS

PDF

109.5 KB Created: 2021-02-13 14:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b99e0610be0740d788589fcaf5fdfff3 SHA-1: 40ad874f08320cb5bb264faebc243572a10daf8b SHA-256: 43a15de116cfd2b6cf138c1403ff3b3261d4f537efcb315a3315b19d030aabff
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers as malicious. It contains an external URI and an SEO redirector link pointing to 'https://jottigo.ru/wix?keyword=lunenburg+middle+school+va', indicating a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of these indicators strongly suggests a malicious intent.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=lunenburg+middle+school+va PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413838/normal_5fdd392d6e530.pdfIn PDF document text
    • http://pimipaxu.22web.org/84134808237.pdfIn PDF document text
    • https://cdn.sqhk.co/kekazorub/jdLhhjj/jeponoluwose.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_600175a108ea7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415321/normal_601e5ef02e99c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_600a6aa3c8a95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476429/normal_6015443c8494b.pdfIn PDF document text
    • http://vexubakobixun.22web.org/aladdin_tv_serial_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475725/normal_600dcd6c2388a.pdfIn PDF document text
    • http://zinabexodepo.iblogger.org/saruluv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379236/normal_5ff7ffee037ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://digifasofow.rf.gd/reduce_file_size_quartz_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/blackburn_college_apprenticeship_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/51164278258.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/36562270672.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/80398767296.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/analysis_for_office_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/bukusofofisulewaz.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_off000163f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163F7 5492 bytes
SHA-256: 63647f7a3598531e18395a75a2852492c4268adbbd9feacc064ce4c91e725360
font_01_sfnt_off0001767e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1767E 15576 bytes
SHA-256: 79f2306b09d7721f9f990d33e7f2c39304d2ad0c997becdce21da45f90e4cbf4

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