Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16cfc46db436d75…

MALICIOUS

PDF

68.1 KB Created: 2020-11-11 16:50:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ed520dca3cf9964775e2d5a01e1b906b SHA-1: 1423144c10f9f99c427893a216a9bc67f235f71c SHA-256: e16cfc46db436d75e67060ea4eefa9c270ce76718d458d01dbb0eb42951a1af1
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, suggesting it functions as a link farm to direct users to potentially malicious websites. The document body, though heavily obfuscated, contains references to 'Gta 5 unblocked 66', likely a lure to attract users interested in pirated or unauthorized game content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://trafffe.ru/123?utm_term=gta+5+unblocked+66 PDF link annotation
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/5b6e884c5a16a.pdfIn PDF document text
    • https://mizunawakore.weebly.com/uploads/1/3/1/4/131406356/damakeferojeve-nuniletugir.pdfIn PDF document text
    • https://juwatupajevofa.weebly.com/uploads/1/3/4/7/134705275/rukelawijev-xexuv-jutomofuvefugow-soxoragubodope.pdfIn PDF document text
    • https://panenojaro.weebly.com/uploads/1/3/4/4/134482399/pipubimafakiworirex.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/ccd87897318c8af.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/soxuboxesumexi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/subud/widixodanediwal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd28827-22e2-49f5-9936-741f55ebc776/mavanurofigutijobevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6c52849-ea08-4940-b529-9bd24fde41f9/50182092442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae74f95-b60a-4827-9bba-0f117eb2a56b/18618732097.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/14278856147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8ba313-c8a4-45de-9667-031e25f5b6d2/uplay_games_keep_crashing.pdfIn PDF document text
    • https://s3.amazonaws.com/suzitivasekoga/suzutel.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/annie_martell_death.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9F 5172 bytes
SHA-256: 46ea82620395e3360e9f4a5d4d1a90963791a3eef79d253b3367ddc64db93d60
font_01_sfnt_off0000cc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC51 9944 bytes
SHA-256: d657c309988e1549dd4ad42b7c3912765c4dbbe39ec32a0ccb6cea77fd85c434
font_02_sfnt_off0000ee6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6C 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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