Malicious PDF — malware analysis report

Static analysis result for SHA-256 5abb503a88c78a57…

MALICIOUS

PDF

57.5 KB Created: 2020-09-17 11:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4dc3027bf2e82176163be90b838318d SHA-1: b97ab1b1aa9d390797eb9cac62db76323fa688e9 SHA-256: 5abb503a88c78a5734620e0e341c367fd1be1366b73a945f241c635410f3f335
162 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with a critical heuristic identifying a malicious redirector link. The document body, though heavily obfuscated, contains text related to 'showbox apk' and a URL that appears to be a lure for downloading software. The presence of a malicious redirector and a link farm suggests an attempt to direct users to malicious sites, likely for malware distribution.

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.
  • 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.club/wix?keyword=the+real+showbox+apk
    • http://files.donviecelli.com/uploads/1/3/2/7/132712206/7908265.pdf
    • http://files.saltydogtactical.com/uploads/1/3/1/8/131871605/76734089d599633.pdf
    • http://files.burnbyequestrian.co.uk/uploads/1/3/0/7/130740053/eca6d3c0ee70.pdf
    • http://wakadu.thomasmccartypromotions.com/uploads/1/3/0/7/130740026/diwobonar.pdf
    • http://pozejis.gilheanyresearchgroup.com/uploads/1/3/2/6/132682735/voxatewemagole-pifelogasarotuz.pdf
    • http://zetagu.pebblehurst.com/uploads/1/3/0/7/130775841/878610b0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7d38e88c-744a-4c2c-bb09-e069de22191a.filesusr.com/ugd/d1c05f_b8cb34c9971f4d0f8ecfde559692d1c7.pdf?index=true
    • https://7bc0e197-988a-49cb-a993-25eb1a70a3f4.filesusr.com/ugd/868401_81b1b5f05cb54d5fa063e6fb240b1481.pdf?index=true
    • https://5d5746bb-75e2-44a1-b6fe-e61e7aea120a.filesusr.com/ugd/b90ba1_908eec169b064be8ac51d83db54c9716.pdf?index=true
    • https://329b570a-a943-4192-a327-a412e27bb2b9.filesusr.com/ugd/51c472_6d0cf5ed229e41df896ddd5653c081ce.pdf?index=true
    • https://7fea15bd-32c6-46cd-a535-82f3ce229053.filesusr.com/ugd/510a18_32f5b0309bfd4bc08efc4c6dc77a115a.pdf?index=true
    • https://bf05d402-d674-4a45-b0bd-33a541e4354d.filesusr.com/ugd/5f5755_3514ee8d61494e32b0a2bcb57e422ca7.pdf?index=true
    • https://fac62661-6395-4407-ac41-70b550eb8e93.filesusr.com/ugd/7603ae_74789e8fbf45457eac5d356835eece61.pdf?index=true
    • 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_off0000a361.bin
d8948ae7d3081dd5c988c7c04f82523478a4aa18a156e653a66bddf4fa47853a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA361 5220 bytes
font_01_sfnt_off0000b526.bin
f0cb84788df7d18738435b7a4953fc017871b13628eb4ac0a5ae47ecf8be5d82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB526 10696 bytes

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