Malicious PDF — malware analysis report

Static analysis result for SHA-256 10aa1a89849fa81d…

MALICIOUS

PDF

68.4 KB Created: 2021-01-06 07:38:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 7b254e20ac847cb73b8570b257848c92 SHA-1: f8ff6b248446a07603dcb788d72ccabd022d18ab SHA-256: 10aa1a89849fa81d2a009e3aeec0bb642dd685690dc606e2608bc572088f985e
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to redirector infrastructure and link farms, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to a movie, likely to entice clicks on the malicious URLs. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?utm_term=alanis+full+hd+movie In PDF document text
    • https://cdn.sqhk.co/murefazomejo/kKxifJz/best_white_frame_app_for_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/mjiichg/27503291577.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5f899636d7570.pdfIn PDF document text
    • https://vexefanakaxaki.weebly.com/uploads/1/3/4/8/134871487/1071302.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/ef998bc5.pdfIn PDF document text
    • https://cdn.sqhk.co/siwemawatu/EidRvSS/lock_screen_rotation_on_iphone_8_plus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495039/normal_5fe3455911ed5.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/hcamehd/toca_life_town_apk_aptoide.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/Dgjvzja/hit_tha_roof_speed_gang_traduction.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/cbnCgh2/74209995617.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/sigobija/58193143607.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/best_free_antivirus_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/xijiwekomumuti.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/rulagepululas.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/monocots_vs_dicots_flowers.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/critical_ops_android_apk_data.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_off0000cdc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC1 5100 bytes
SHA-256: ac213c9f9661d3e158305e6dd6567a2469fec1d66106572eb1a7bfff28bb54b4
font_01_sfnt_off0000deff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFF 11168 bytes
SHA-256: 5d243da0801c89d63f7d0ecd7a3201b80dcf0e2e9d792e64423135db9512915e

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