Malicious PDF — malware analysis report

Static analysis result for SHA-256 225eb1a37aa4c2f2…

MALICIOUS

PDF

46.2 KB Created: 2020-08-22 15:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22c10486b7ac66f4d68c2e1d90f83e25 SHA-1: b2729810bf754d9a8b97ab5573b205a73782e234 SHA-256: 225eb1a37aa4c2f244aa8641c68c5a7348de1ed1bc8a6f3c692331f002e556b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a specific malicious redirector URL, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'iim indore admission form' and the malicious URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector and link farm indicates a likely attempt to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=iim+indore+admission+form
    • http://tadoja.tamaraarmstrong.com/uploads/1/3/0/8/130814328/5515279.pdf
    • http://files.wholesomehearthhg.com/uploads/1/3/0/8/130813095/3c86a6bd36.pdf
    • http://files.sainthonorepastry.com/uploads/1/3/0/7/130740165/xixixi-fufufoxiz-xafagobugazof.pdf
    • https://cdn.shopify.com/s/files/1/0438/6072/1829/files/islamic_belief_system_shomali.pdf
    • https://cdn.shopify.com/s/files/1/0449/6467/5752/files/78810803494.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/ramif.pdf
    • https://cdn.shopify.com/s/files/1/0437/6579/2929/files/kukodorijuwusugamub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40323832667.pdf
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/tosibugenafa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4302/8120/files/terap.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/sidubupa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9364/6753/files/tafukevudunu.pdf
    • https://cdn.shopify.com/s/files/1/0436/8351/2473/files/dujus.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076d6.bin
9dd00c16f527279d4754bd13b9127eb6e8d0f10475ddb937a3b4765f84bc3a20
pdf-font-stream PDF embedded font (sfnt) at offset 0x76D6 4960 bytes
font_01_sfnt_off00008792.bin
abcdc40fefc21e7f680537c27ec73e37fbae16b5662107c1d1359a10da7a90ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x8792 10912 bytes