Malicious PDF — malware analysis report

Static analysis result for SHA-256 8160d1119a4ee14f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-11 08:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95c19c721dcfca6a03f137cfbb4dd55e SHA-1: 5d38c395993d9fe70d52372118f5ac57f50cb7e8 SHA-256: 8160d1119a4ee14f84cc9323b3a0d236c391ad75365d42851fb20d9b24312065
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as an 'Aadhar card pdf pass' lure, which is a common tactic for credential harvesting or MFA bypass. The document body and heuristics indicate a phishing attempt, likely to trick users into providing sensitive information or approving fraudulent login attempts. The presence of numerous links, including a redirector, suggests an attempt to distribute further malicious content or lead users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=aadhar+card+pdf+pass
    • http://files.southernpressonline.com/uploads/1/3/2/7/132712530/b658a7c9c1.pdf
    • http://toxod.newriverknockouts.org/uploads/1/3/0/8/130814328/229980.pdf
    • http://benilosak.hootandahalf.com/uploads/1/3/1/3/131380600/vaworidefevawi.pdf
    • http://files.bobgraysonart.com/uploads/1/3/1/3/131379353/3560873.pdf
    • http://dimuwigo.theblacksmithexperience.com/uploads/1/3/0/7/130739024/pebekufojasasig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5847/0807/files/xagerafosupijujenufowu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/81979433934.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/diferencia_entre_anabolismo_y_catabolismo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/futowezatutaket.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/43998931250.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9434/files/5512898053.pdf
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/78700793754.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5619/files/wugutipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1204/6491/files/31548519365.pdf
    • https://cdn.shopify.com/s/files/1/0434/7074/9861/files/metabolic_disorders_in_cattle.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/faxowu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/rogabenepamakawi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/22586651274.pdf
    • https://cdn.shopify.com/s/files/1/0437/1926/2357/files/97820857301.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006604.bin
759d56680eda2c5a512d4ff4205d766e24416aabf271e02e08cb2bfbde579d53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6604 5200 bytes
font_01_sfnt_off000077a8.bin
c13560b6596571ae142add02d07739a18239a9bdbe61b36fea6078bfcae775e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A8 10216 bytes

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