Malicious PDF — malware analysis report

Static analysis result for SHA-256 21fe0f5cfb095ad5…

MALICIOUS

PDF

45.3 KB Created: 2020-07-08 20:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0866f0f4eb8ce5cbcee72ed79df7b215 SHA-1: 07d51707388eaa6180df020076a7e899911be0b8 SHA-256: 21fe0f5cfb095ad50df4c998bd42827236bd4a7d8cecc57c7b95856ffdb22d86
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Swot matrix template pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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.ru/wb?keyword=swot%20matrix%20template%20pdf
    • http://files.upwardfacinglife.com/uploads/1/3/1/4/131436971/velolerulamur_baxafijirun.pdf
    • http://files.lauraavnaim.com/uploads/1/3/0/9/130969819/0ec2ee5.pdf
    • http://files.snowboarddojowiz.com/uploads/1/3/1/6/131606631/lamiteb-bujujiv-tunaxoku.pdf
    • http://files.robertaingranata.com/uploads/1/3/1/4/131406369/c2af016086.pdf
    • http://files.mrsassmansclass.com/uploads/1/3/2/7/132712373/298558.pdf
    • http://files.fitwoofitness.com/uploads/1/3/0/9/130969477/3669056.pdf
    • http://files.braverthanthewaves.com/uploads/1/3/1/4/131453807/5359755.pdf
    • http://files.castlewoodclays.com/uploads/1/3/0/8/130873907/b18a71fa7bc6.pdf
    • https://jumuxek227837891.files.wordpress.com/2020/06/wesapuvigata.pdf
    • https://sogifefuve684083845.files.wordpress.com/2020/06/sujurawubuf.pdf
    • https://jesudutidak.files.wordpress.com/2020/06/39880812024.pdf
    • https://mexotorojope.files.wordpress.com/2020/07/redugikujodo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000760f.bin
7e568e6cce266d97483c2d4f84ba3465d2478742376f500b9003c2d5db62598e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760F 4956 bytes
font_01_sfnt_off000086f7.bin
5f44371312f9235a54afaf522251a20e65b6dcb9092db3d3abfe041395a1aae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F7 9736 bytes

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