Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a7e0616ce1a98d…

MALICIOUS

PDF

42.6 KB Created: 2020-10-27 17:23:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6538a3ede92bd5995985ba63c2914664 SHA-1: 9b9418412c29b11e1c89e0919b6b41bbaae08e4e SHA-256: 40a7e0616ce1a98d1ed5233775871b5755eec610a0ec76690345155094cb25d0
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be part of a phishing lure related to 'sample lesson plan for elementary'. The presence of multiple links to external PDF files, some of which are benign, suggests an attempt to mask the malicious redirector among legitimate-looking content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://gettraff.ru/strik?keyword=sample+lesson+plan+for+elementary In PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/ddb313.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/timufitu.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/8826649.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/5790791.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/gowena.pdfIn PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/5220344.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/nivivojesezop.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/nikewo-sokulifajigi-tomedot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9665/7058/files/chronic_bronchitis_treatment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2612/8289/files/32088409334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2589/9426/files/plotagon_story_apk_obb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9915/2292/files/16492963733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fef4751-efcb-4d70-b768-45a059640c1e/61128183291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf737b49-02ca-45ed-bb46-91b861b5eece/full_body_laser_hair_removal_cost_dallas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/awesome_cheap_android_phones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/9105/6571/files/zaanse_schans_self_guided_tour.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0724/4955/files/carlos_castro_todos_supermarket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4548/5725/files/71255781238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5801/0544/files/proportional_vs_non_proportional_graphs_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51e2fee-1f99-46a0-a8ac-57b23621f205/80984563902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94cc7637-71aa-435c-a736-1585b6ce2091/pictek_t7_wired_gaming_mouse_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0157a345-6c9f-48a7-9dd8-fe43f9d006d8/9196142971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/343c43f5-224c-4d05-b9ce-c54e81c53ce5/7124728228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f348e71a-f95d-4067-9249-91343995b026/ordinary_light_a_memoir.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E5 5252 bytes
SHA-256: 7e33640257eb15318aa245e5ca3185ba9669bb5a19325c409eb1ab28e42f4afb
font_01_sfnt_off000079b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B1 10336 bytes
SHA-256: 57cf6569d0f0cc1a877afe1510f9775dacb59adfa0e2c6470e7136307142891b

Open this report in the interactive analyzer, or submit your own file for analysis.