Malicious PDF — malware analysis report

Static analysis result for SHA-256 23962284547b7fef…

MALICIOUS

PDF

78.6 KB Created: 2021-03-05 09:13:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f566e5085628b00dae635b58ce4a0231 SHA-1: 50e3d3bd15d0a8521b292aaced06c31c69ce1368 SHA-256: 23962284547b7fefff9f9656c058bd63f4962e530eb8ac7d65b285a8d170175a
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable domains and form a link farm, suggesting a phishing or content-luring scheme. The document body, though heavily obfuscated, contains text related to 'Aztec and inca social structures' and the wkhtmltopdf tool, likely serving as a lure to disguise the malicious intent of redirecting users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/wix?keyword=aztec+and+inca+social+structures PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497650/normal_5fff56d64c311.pdfIn PDF document text
    • http://kayikciakademi.com/psychology_principles_in_practice_answers5mscf.pdfIn PDF document text
    • http://mamajan.space/2348868736wvp2c.pdfIn PDF document text
    • http://itnegozio.info/solemavabasatelofefupofan3bpvt.pdfIn PDF document text
    • http://forecast.bet/2949298966l6qu1.pdfIn PDF document text
    • http://homiak.fun/33090726584rypgv.pdfIn PDF document text
    • http://libralab.digital/bexadikaparenefwtl8n.pdfIn PDF document text
    • https://kefuvarunif.weebly.com/uploads/1/3/0/7/130739830/7049037.pdfIn PDF document text
    • http://sodalabs.pro/8496217627960mkj.pdfIn PDF document text
    • http://remawunusubo.22web.org/applied_science.pdfIn PDF document text
    • http://praktika-ingenieur.com/60203050811garku.pdfIn PDF document text
    • http://fesebenawasoz.iblogger.org/xozubuzibalad.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/1026291.pdfIn PDF document text
    • http://mattelipsticks.site/zolonumamakun8qr1.pdfIn PDF document text
    • https://xokekomoto.weebly.com/uploads/1/3/4/5/134598663/togovipame_merunezo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370268/normal_5fde499baa1ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410004/normal_5fff5df499ae3.pdfIn PDF document text
    • https://dilozerekake.weebly.com/uploads/1/3/1/4/131452754/1471894.pdfIn PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/wamiwak.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/wizuluworafid/pakistan_visa_form_for_bangladesh.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/employment_news_3_august_2019.pdfIn PDF document text
    • http://kovemipenege.rf.gd/hamilton_beach_toaster_oven_31142_review.pdfIn PDF document text
    • http://powajokex.rf.gd/colbert_report_episode_one.pdfIn PDF document text
    • http://kafopazam.epizy.com/29785230443.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/xulaxofezopisewonudu.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_off0000f910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF910 4972 bytes
SHA-256: 606f22c95525939ef3419d5a627a97af2d49986428e2d796ddac5439997c68ad
font_01_sfnt_off00010a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0D 10196 bytes
SHA-256: 19c5bb58fee01e7a75e17e0122417af82ad7947876537a4d48c30dc8db926e47

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