Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e170038c7fc6f8e…

MALICIOUS

PDF

38.3 KB Created: 2020-10-31 08:35:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 585ed2e8edf0330295c241f809fdc5fb SHA-1: ed85efc68e2bf159c549127174519a96f7f6609e SHA-256: 4e170038c7fc6f8e2313cbcf82bbdded831260e45382ff1e38b50e57e1517b67
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, with a critical heuristic identifying it as a malicious redirector and link farm. One of the primary links points to a known malicious redirector infrastructure, and another leads to a PDF link farm. These tactics suggest an attempt to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://cctraff.ru/aws?keyword=onity+advance+hotel+door+lock+motherboard In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nowawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386080/normal_5f9cff0b89caa.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/vananox-sinudapisuzib-pukaxukesabeka.pdfIn PDF document text
    • https://dopuxaponaxu.weebly.com/uploads/1/3/2/6/132695391/9c8a6d23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f8968cb3e7e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394062/normal_5f9703abafc93.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/sajatesawodiji/48670996565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8032/8372/files/8063827183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6135/3889/files/51790512484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/prayer_for_wisdom_catholic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/6216/2118/files/cats_and_dogs_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0307/4984/files/surupemalofereja.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/the_non_designers_design_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5489/3722/files/black_panther_wallpaper_4k_for_android_download.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_off000057ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57AD 5392 bytes
SHA-256: 4524b4c8d9ddda153d5cbf59552ab9debd9412764b6e19fb77a05d4a05482637
font_01_sfnt_off000069e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E0 10048 bytes
SHA-256: a272087167d6ede7dc299a7a5c198b7cc712357c69092b9811ccd45df7ffd6a3

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