Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fcf16160aa7bc32…

MALICIOUS

PDF

51.4 KB Created: 2020-08-12 09:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21562b8848483702688059f751f21bff SHA-1: 49940d2a2f9798f0041ada378e860ff6931c8397 SHA-256: 0fcf16160aa7bc32dd6251090207473c647ca81fa84714c6905de59845e5f66a
162 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'marriage certificate form pdf mumbai', suggesting a lure. The presence of numerous external PDF links, including a malicious redirector, indicates an attempt to lead the user to potentially harmful 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ru/pify?keyword=marriage+certificate+form+pdf+mumbai
    • http://files.ghecca.com/uploads/1/3/2/7/132710779/0c3656.pdf
    • http://vubifij.progressivenewsradio.org/uploads/1/3/2/8/132814989/365748.pdf
    • http://files.merarifernandez.com/uploads/1/3/1/4/131407165/6839308.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/18232059811.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/41244533097.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/39225082265.pdf
    • https://cdn.shopify.com/s/files/1/0451/1091/9321/files/fivenunilimunemabunetenom.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/gloomhaven_rulebook_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3898/files/blague_de_toto_courte.pdf
    • https://cdn.shopify.com/s/files/1/0440/6735/6824/files/jotagagobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7678/8117/files/bolens_riding_lawn_mower.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/bipixo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/righteous_mind.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/60322985653.pdf
    • https://cdn.shopify.com/s/files/1/0429/9158/3391/files/60455205328.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/22306766576.pdf
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/amber_run_i_found_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/0604/0992/files/51038654907.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a022.bin
1ca6089169e4fafd8acd1852e5b05a04aa8b67eabad31da17a70c4c2b78c44b0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA022 8700 bytes
font_00_sfnt_off00006b04.bin
ebd82ce3f537112c1b3b1b7a39870840048a66fd6e3b50208b5321621c043e41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B04 5408 bytes
font_01_sfnt_off00007d4f.bin
5625c4bdcfa0844a1ab7c6a78a9e69c3aa258fe7b627587d65feeb43df4725ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4F 10120 bytes

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