Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa806dd0a416f5c…

MALICIOUS

PDF

77.1 KB Created: 2020-11-23 22:27:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32c023bc654e4cba74955042389f64ae SHA-1: 187e189c71f8c384ba3cf7ca51558dc25d731ea2 SHA-256: baa806dd0a416f5ce284d23cf79cab72c3f4ddaf61e4f24862731199ca54efd9
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF file flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure and an advance-fee scam lure. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest a redirection to further malicious content, likely part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://traffmen.ru/123?utm_term=infiltration+water+cycle+example
    • https://wokukome.weebly.com/uploads/1/3/1/6/131636951/gedupikuzomovaxe.pdf
    • https://cdn-cms.f-static.net/uploads/4392656/normal_5f9af0f46963f.pdf
    • https://cdn-cms.f-static.net/uploads/4410447/normal_5fa73cdc4f444.pdf
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f8a2a37dbc07.pdf
    • https://siziloxa.weebly.com/uploads/1/3/4/7/134747516/dafijigoz-wozurolumidopi.pdf
    • https://cdn-cms.f-static.net/uploads/4402724/normal_5fb9e35472e14.pdf
    • https://cdn-cms.f-static.net/uploads/4477138/normal_5fa6d40ca6288.pdf
    • https://cdn-cms.f-static.net/uploads/4480876/normal_5fb48496d00c8.pdf
    • https://vebeviwikime.weebly.com/uploads/1/3/4/3/134317270/4961932.pdf
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/85f5a0.pdf
    • https://susevire.weebly.com/uploads/1/3/4/8/134885610/5f006389b700.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zetare/67549421631.pdf
    • https://s3.amazonaws.com/laradusa/gudelidetanefuvetisemot.pdf
    • https://s3.amazonaws.com/kagedatabujo/boko_haram_new_release_video.pdf
    • https://s3.amazonaws.com/xumakomowi/37479436897.pdf
    • https://s3.amazonaws.com/vufupu/51263864765.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_off0000f2b5.bin
07d919ea13827a5b320ade1cab3d176bd6c8c9bf2544ef6864b480da6e7d8f42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B5 5184 bytes
font_01_sfnt_off00010462.bin
697ff02a37be05b5f136f86c6e57b934a45bea863c32e384eaf8dc93f57d6af4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10462 10328 bytes

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