Malicious PDF — malware analysis report

Static analysis result for SHA-256 f083c539db130059…

MALICIOUS

PDF

42.7 KB Created: 2020-08-12 18:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b32a78c7386f05cafe5b19c45fbed3da SHA-1: 33f9d2190884a7e345f7daf8b685b64ea8199173 SHA-256: f083c539db130059d832ee43d3bb3efaf94d1bb1c02596c09bdb6e146edcab5c
154 Risk Score

Malware Insights

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

The PDF contains a lure related to an adoption application form, which is a common social engineering tactic. It embeds numerous links, including one to a known malicious redirector, indicating an attempt to lead the user to harmful content. The ML classifier strongly supports the malicious nature of this PDF.

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://ttraff.cc/pify?keyword=adoption+application+form+for+a+child+pdf In PDF document text
    • http://files.menomoniesaddleclub.org/uploads/1/3/0/9/130969204/potexoti-gudaromiwitaxus-nunewipuxugab.pdfIn PDF document text
    • http://files.comingforherbstreitsjob.com/uploads/1/3/1/3/131378776/668651.pdfIn PDF document text
    • http://files.newhope4children.org/uploads/1/3/0/9/130969717/mekojitoroded_zudisunabav_gevazoxesunafu.pdfIn PDF document text
    • http://files.plainfieldgirlscouts.org/uploads/1/3/1/4/131407138/0ef27f38437.pdfIn PDF document text
    • http://files.mselliottsreading.com/uploads/1/3/0/7/130775985/7acf080.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/1/0433/0687/7080/files/27150836515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/40555109442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6623/6834/files/16452730038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2926/5564/files/jamulupadobejinipujuzibud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/19599061261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7454/9928/files/34631685674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9866/1279/files/71664027683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2166/3397/files/balance_ton_quoi_partition_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9573/5976/files/bronte_go_station_mini_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0492/7905/files/rakajomovekatigurewavokek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/kaxuwutusage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9074/6267/files/fasesetaduvuvifedodivix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/auxins_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7699/1653/files/modern_performance_appraisal_methods.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_off00006a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A14 5204 bytes
SHA-256: eca14b22f64a344e6fc5d38f9e1663ece1bd0baa8872653e1b2e992d0f28f60f
font_01_sfnt_off00007b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B97 9880 bytes
SHA-256: c1062ce545f687f83c8266093a454d951a24200122693659b253ceb5ef54b45a

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