Malicious PDF — malware analysis report

Static analysis result for SHA-256 70bb7b14fa156640…

MALICIOUS

PDF

42.1 KB Created: 2020-08-18 22:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c893cfe28b230e497d36ab423e84bbe6 SHA-1: d94f7bd430291d9d246e62d3e22f0f1a72fe85c1 SHA-256: 70bb7b14fa1566404ebcc5d2da4b3f340dc6546b4b1bfe97acef635bd6356259
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure to execute commands via the clipboard, as indicated by the 'SE_CLIPBOARD_COMMAND_LURE' heuristic. It also features a large number of external links, with one pointing to known malicious redirector infrastructure. The document body contains obfuscated text and URLs, suggesting an attempt to disguise malicious activity and potentially download a second-stage payload.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.com/pify?keyword=dalvik+bytecode+editor+pro+apk
    • http://files.bicca.org/uploads/1/3/1/3/131383864/dekosujupuguko.pdf
    • http://files.pommedapidaycare.com/uploads/1/3/1/4/131453615/71f8189.pdf
    • http://fakopopum.diabeticeyejournal.org/uploads/1/3/0/7/130776167/fudumegosi.pdf
    • http://files.minnewaskawarmup.org/uploads/1/3/1/6/131606789/4408093.pdf
    • http://monatasar.tmclegacydance.com/uploads/1/3/1/8/131871390/pijozajinojirul_lutid_jazekapufuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0445/4681/8207/files/french_colours_worksheet_ks2.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/cardiovascular_system_short_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8789/files/fadurapukoni.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/zonozamibopuwelij.pdf
    • https://cdn.shopify.com/s/files/1/0439/1141/3915/files/60159328172.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/xovikigokizireva.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/rearrange_pages_foxit.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/gifomegufibukume.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1254/files/better_villagers_mod.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_off0000612c.bin
bb056afec445c7e5acb72bc2a7baab2535cd78cc23d0046d898ae30b79cab190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612C 5256 bytes
font_01_sfnt_off00007316.bin
6ddb68c118948c12fb66b9feb0970eec55b9acc44d5b64619d37523223ce6554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7316 12604 bytes

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