Malicious PDF — malware analysis report

Static analysis result for SHA-256 42de4793ac35fa60…

MALICIOUS

PDF

62.3 KB Created: 2020-11-19 09:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8eb4f6485db37f4a17a469386f8d6800 SHA-1: d4640025aeda1a73a01654165702d95465cdd06f SHA-256: 42de4793ac35fa6009625105a8de5a314cafc33dc52ad857b3493fbcdcde5d5b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'traffnew.ru', which is likely a malicious domain used for phishing or to serve a second-stage payload. No scripts were extracted, but the presence of the external URI and the high detection scores suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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
  • 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://traffnew.ru/aws?utm_term=cartiform+viable+osteochondral+allograft
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/20206fb0-d9e7-40e4-9353-93da42034345/gudazik.pdf
    • https://s3.amazonaws.com/sowewazulejewi/imperialismo_na_frica.pdf
    • https://s3.amazonaws.com/boxalewijim/seronipo.pdf
    • https://uploads.strikinglycdn.com/files/1035b370-0bf5-4eae-a422-02d6237b1063/3_doors_down_6_feet_from_the_edge.pdf
    • https://s3.amazonaws.com/gupuso/balanced_scorecard_bahasa_indonesia.pdf
    • https://s3.amazonaws.com/levumoduf/fojufufugiduwozizew.pdf
    • https://s3.amazonaws.com/wupiwupiwot/lulusulof.pdf
    • https://s3.amazonaws.com/wonoti/fobode.pdf
    • https://s3.amazonaws.com/wupiwupiwot/batugixabawed.pdf
    • https://s3.amazonaws.com/rirusozo/49981259089.pdf
    • https://uploads.strikinglycdn.com/files/b28d0893-9798-4655-adbe-ee2245e749e3/tidilupunedajulusojenibo.pdf
    • https://s3.amazonaws.com/radubozufiwo/82674605016.pdf
    • https://s3.amazonaws.com/peveziwoguxuzam/cisco_vpn_client_for_android_phone.pdf
    • https://s3.amazonaws.com/sugaguxagu/64973823849.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_off0000b3ad.bin
df20ef9dc659c30d9f381b581a3480c2a53f438cf391eac2c38b1a2f36f9fe58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3AD 5540 bytes
font_01_sfnt_off0000c65c.bin
1bf45922ffd3ac0df24064f0419c708d451c0893448a8852e786c552c58c360f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC65C 11280 bytes

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