Malicious PDF — malware analysis report

Static analysis result for SHA-256 e79fa4a5671b44e7…

MALICIOUS

PDF

77.1 KB Created: 2021-02-25 23:32:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 596f2be7aa2b2e3b298c295dfee08af9 SHA-1: a270bd83972cf0c75b65617238edc8d3983ed455 SHA-256: e79fa4a5671b44e7107fbc4aaead74a401eb40f51dc422cef320278267d9f256
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a domain that appears to be serving malicious content, likely related to the search query for an APK download. The document body, though heavily obfuscated, contains keywords related to the embedded URL, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=d2h+smart+remote+apk+download PDF link annotation
    • https://cdn.sqhk.co/kugorazig/NFaiihg/blood_pressure_machine_for_home_use_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/vixivizal/iphgjdX/61907557796.pdfIn PDF document text
    • https://cdn.sqhk.co/tuforalogidu/ijJJOge/fold_up_treadmill.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501654/normal_600f50ceb19a1.pdfIn PDF document text
    • http://vefipitop.22web.org/vewufokixize.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406454/normal_6026697f88416.pdfIn PDF document text
    • https://cdn.sqhk.co/tevimuwijile/mXhhhjP/transfer_case_fluid_leak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456999/normal_5fcf3209dbca7.pdfIn PDF document text
    • http://pusikoxelumide.iblogger.org/54152611855.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448542/normal_5fe0228818a86.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/kagedatabujo/77454280165.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/icao_annex_17.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/94728023319.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/midon.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/widumojawepavogon.pdfIn PDF document text
    • http://wawefib.rf.gd/vowesekanelokezemi.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/78038624152.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/65327042712.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13A 5484 bytes
SHA-256: 040bd186871bfea85ee3f133e1726564d0347b488c07f684b6c713bb21997aad
font_01_sfnt_off000103ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CA 10352 bytes
SHA-256: 8659f12d46259f788b288772d68b53ef87fafd92d4d60994405d733771ffe5c0

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