Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d73637e82de8bb0…

MALICIOUS

PDF

46.5 KB Created: 2020-08-14 03:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb2e0490f96abd6aca1c8687efadf31c SHA-1: 4a0318d4ef97fe9ff91e30964815fd308b85a973 SHA-256: 6d73637e82de8bb0e95874234f942bfe5e6b0b06abda3548b815d3ce88668e78
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure suggesting a registration form and includes numerous links, with one identified as a malicious redirector. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to trick users into engaging in an advance-fee fraud scheme. The presence of many external links, including a malicious redirector, suggests the document is designed to lead users to malicious infrastructure.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=maharashtra+bandhkam+kamgar+registration+form+online
    • http://jofafu.sippicanchoralsociety.org/uploads/1/3/0/7/130776688/e5fa12c9e9ddd0.pdf
    • http://files.shunsart.com/uploads/1/3/2/6/132695216/bozovufiruvige-dixub-jirodur-tomonixalan.pdf
    • http://files.1stkentuckyrifles.westhistory.net/uploads/1/3/0/9/130969645/bokefa.pdf
    • http://donap.holisticblendssoap.com/uploads/1/3/0/8/130814448/dcec0.pdf
    • http://files.artinwales.com/uploads/1/3/1/6/131637562/xuziji-girikiso-sukosolifekom-tizur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/wegoxopo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/the_fifth_discipline.pdf
    • https://cdn.shopify.com/s/files/1/0436/2865/8848/files/77556542180.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/16526908446.pdf
    • https://cdn.shopify.com/s/files/1/0436/9901/1738/files/ansioliticos_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0433/2978/1918/files/13156566633.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3232/files/juwotitesejivugorax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49605194079.pdf
    • https://cdn.shopify.com/s/files/1/0437/1018/5621/files/neural_networks_and_back_propagation_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/13322229117.pdf
    • https://cdn.shopify.com/s/files/1/0432/2204/0731/files/18028701955.pdf
    • https://cdn.shopify.com/s/files/1/0431/1348/0343/files/54897046836.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6437/files/2855877030.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
font_00_sfnt_off000067cb.bin
fd66d0fd4535b6005ae3bbbf57720852e4ac6e4b7b9ac4f471ccbf7d1d3e7188		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67CB 5528 bytes
font_01_sfnt_off00007a6f.bin
0292665bddf98014f1ade5355473020e188e95235b315e055bd5a04765bc9378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6F 10276 bytes
font_02_sfnt_off00009d94.bin
3be089b0b189d40967917c5eb39025adbec5933405afe8306077e894d10a139c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D94 3960 bytes

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