Malicious PDF — malware analysis report

Static analysis result for SHA-256 5002b5b7b73d01b2…

MALICIOUS

PDF

58.2 KB Created: 2020-03-07 16:41:35 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9326e7105f006436e01b1f1a57f322fe SHA-1: 5560e11fbf5039590919de5ca5347fb7c8557a40 SHA-256: 5002b5b7b73d01b2ea5c49f2f86d605cca9ba4ae9dde4f2097fba955c8a0b313
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of SEO poisoning or a link farm designed to drive traffic to potentially malicious content. No scripts were extracted, and the document body is heavily obfuscated, but the heuristic firings strongly suggest a malicious intent to redirect users to external resources.

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://autodiscover.coprimag.com/uploads/1/3/0/2/130289721/130289721.html#english+somali+books+pdf
    • http://hostmaster.appwa.net/uploads/1/3/0/3/130323151/8986671.pdf
    • http://sofiatimotheou.com/uploads/1/3/0/7/130776003/687256.pdf
    • http://cristawadsworth.com/uploads/1/3/0/5/130540021/wiseronegex_bukopiwa.pdf
    • http://livingstonffafloral.com/uploads/1/3/0/7/130775127/kekimexuvowenizazo.pdf
    • http://samsungrepaircenter.net/uploads/1/3/0/6/130639636/dacee6c4c480.pdf
    • http://amychair.com/uploads/1/3/0/2/130289334/c7422c1.pdf
    • http://uncheck-verify-account-icloud.com-unlocked-valid-account.com/uploads/1/3/0/6/130604136/6982035.pdf
    • http://chainbreakingrecoverycoaching.com/uploads/1/3/0/5/130588286/natesitil.pdf
    • http://damencorrado.com/uploads/1/3/0/2/130288818/ef35c2.pdf
    • http://www.lucidpartnerships.com/uploads/1/3/0/6/130622036/rumibiku_fazikerojusaf_javetamanado.pdf
    • http://modestohandyman.com/uploads/1/3/0/4/130476816/febod.pdf
    • http://screenshotup.store/uploads/1/3/0/8/130813851/2331929.pdf
    • http://anastaciorivera.com/uploads/1/3/0/6/130640146/4521319.pdf
    • http://puravidacosmetics.ca/uploads/1/3/0/8/130814526/fupim.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
stream_006_off0000a589.bin
c0ccd8f2514936a06cc02c6780c47b3daab00a37c1888591c23b9a49207eec06		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA589 28000 bytes
font_00_sfnt_off00007f69.bin
b38fa1e60b4bf7c4d2cfdb480d4b3981b0ce66dac442d083f2238f0242e03df8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F69 10264 bytes

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