Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9195834e7b5291…

MALICIOUS

PDF

74.0 KB Created: 2021-02-15 16:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4790da8609faaa4ca6b89dee35fb63d0 SHA-1: e0dd5f47114b2bddbb89950e4dcfdf14a311001c SHA-256: 8a9195834e7b5291db9c2aa7c8dd947185787a3cfd998408da9b7b716ce56e3a
156 Risk Score

Malware Insights

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

This PDF document was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection scheme to host malicious content. The document body, though heavily obfuscated, references "2007 mazda cx 7 overheating problems", likely a lure to drive traffic to the embedded URLs.

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
  • 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://jottigo.ru/123?utm_term=2007+mazda+cx+7+overheating+problems PDF link annotation
    • https://mesubepivugegej.weebly.com/uploads/1/3/2/6/132682347/1655560.pdfIn PDF document text
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/lulebigapukufegibuk.pdfIn PDF document text
    • https://nomikevokatipo.weebly.com/uploads/1/3/1/8/131859895/6838405.pdfIn PDF document text
    • https://pojajowose.weebly.com/uploads/1/3/0/8/130813819/729353dd8f7133.pdfIn PDF document text
    • https://barofabilis.weebly.com/uploads/1/3/2/7/132712093/rorobu.pdfIn PDF document text
    • https://fojozotewimoko.weebly.com/uploads/1/3/5/3/135324817/povejirixizat-vatevalib-gelafosepanu-robapidikuxud.pdfIn PDF document text
    • https://vavirewafikeja.weebly.com/uploads/1/3/4/4/134402836/74e5c45065cbdf.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/wazorixekunafob/61346054227.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/bhai_movie_songs_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/58421148466.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/club_car_precedent_batteries_not_charging.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/kewewaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/tufet.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/aluminium_sheet_weight_per_sqm.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/meme_generator_pro_apk_cracked.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/constitutional_pursuit_answer_sheet.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_off0000e300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE300 6064 bytes
SHA-256: 3cbf49cf578af4907f0df1c54e8a9ebfee6efadf899e1080f556c6aa6af708b8
font_01_sfnt_off0000f785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF785 10360 bytes
SHA-256: c625f53c1538ed12a86e74a02cc7f2c0a3dd7bcc22de4606b5c5361af8cbdb54

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