Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f36e11afce5bc8f…

MALICIOUS

PDF

71.6 KB Created: 2021-03-04 23:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94fd3602ff9d9d1ddfe08685568951db SHA-1: 0134b96d2e2dd001ed99966b8cc1fc5e0057f828 SHA-256: 1f36e11afce5bc8f5c73640f14335cd28b95762995d77716c4c9d0218c22616c
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to obscure domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs points towards an attempt to redirect the user to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7937

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://fokemale.ru/aws?utm_term=exploring+psychology+in+modules+with+updates+on+dsm-5+9th+edition
    • https://kiwedudibobo.weebly.com/uploads/1/3/6/0/136097088/8df3c5e0ee9f.pdf
    • https://nutifikidejuz.weebly.com/uploads/1/3/4/3/134347692/ridemaduvip.pdf
    • https://burakatotofok.weebly.com/uploads/1/3/1/8/131871829/28646737.pdf
    • https://kaxaxelakag.weebly.com/uploads/1/3/4/2/134235500/2253455.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b767a4d2-eb7c-4477-a44c-c70957a16aec/13973812096.pdf
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_07162c93686b4ce0ab770eb01762c9a1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6fd14b0e-daaa-4ef5-9da4-5b4bff5f23e0/boxomekapasa.pdf
    • https://uploads.strikinglycdn.com/files/9176cd9b-98d8-4f54-aeb0-d310ef2c1828/femonekapirimojelo.pdf
    • https://uploads.strikinglycdn.com/files/3403cbdf-639f-4ecc-b7b0-e54626ee12c6/91866476542.pdf
    • https://uploads.strikinglycdn.com/files/70bb99cf-be3b-49ca-9193-75eebf046471/bonuzinekovuxutofixebaxa.pdf
    • https://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_712a3f8520f84bed876a491959aadb7c.pdf?index=true
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_858a4bf37c074704a5b6a2d8b496e350.pdf?index=true
    • https://uploads.strikinglycdn.com/files/84420f36-a46f-45c3-8a6c-3d29ddc5c408/logej.pdf
    • https://uploads.strikinglycdn.com/files/660aeb7e-87c2-455b-9d89-3db468a21ee3/tirusozivitajajibawibo.pdf
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_98a796f07b2a48ff9e0ca95aa617b392.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8791961b-8e73-45f1-8022-e14ccf0dcaf2/14844321669.pdf
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_a51b5cc1e90746d78110f04a4cc45b89.pdf?index=true
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_ee9e30774ed44a949210934df90fa6a5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/179905e1-3d2b-437e-959d-7760a621d62e/ogilvy_on_advertising_by_david_ogilvy.pdf
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_f17c45438eab4e2bb61f5c006364379c.pdf?index=true
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_e5b02354d2684476a93931ba0751e6a1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a7b97cae-1fe2-47bd-8f88-abf6123df606/sidogojenexeful.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010838.bin
1725c70628ee26d6035462066caac7c6f19e6a2a26568f7f65c70e2b2cf6c4d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10838 6020 bytes

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