Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91bca48cdcee406…

MALICIOUS

PDF

52.0 KB Created: 2020-11-07 06:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bc8118d6479a99757409e855ff193718 SHA-1: ec6ab0ee36be1148abd24926ee0c8c35e627ad9d SHA-256: f91bca48cdcee406cdc38447c0921788e72fc02c35259a4fce5cee3375851dcb
76 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it's a lure for free downloads, redirecting users to a malicious URL. The embedded URL, 'https://traffnew.ru/aws?keyword=juuni+senshi+bakuretsu+eto+ranger', is identified as a redirector for phishing. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffnew.ru/aws?keyword=juuni+senshi+bakuretsu+eto+ranger PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371269/normal_5f9236362a31d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422135/normal_5f9f9d9af0294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f884513b0127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_5fa068cdb4dfb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8318d6f-4c2c-4393-bd7a-78f2073b86af/hp_deskjet_6540_driver_xp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965a2352-b733-4925-ac8a-93a96a93289d/keywordfnaf_world_download_gamejolt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f7e856-97e7-46ee-9b07-f515dbb461f5/7166311789.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/wezidobad.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/ultrax_labs_hair_surge_shampoo_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/english_article_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/127fa287-4edc-4344-a2ee-3fd83f0b1f4a/avengers_google_drive_hindi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B80 9716 bytes
SHA-256: e66e6a0d3a7e1395576da4b830723496b91579e65c5ed1d83bbb6b8cfc3e0938
font_01_sfnt_off00008b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B44 5108 bytes
SHA-256: c9ff24c0f687dc14fdf37a5775097e0bbecab40198a73a9ed77ea35134ef939f
font_02_sfnt_off00009c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C9E 11760 bytes
SHA-256: 6f8a8854836a9df0a9ca69a90119aa17c779d04e6ff6af388da197479a66c6f2