Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2bfa539b526fd07…

MALICIOUS

PDF

66.2 KB Created: 2021-02-14 07:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1d2610a88ddf99b83bbb91b0aec533d9 SHA-1: 3ea023d2a0ff0bf1697b5de9f20da97262b7057b SHA-256: c2bfa539b526fd079ce96aa68c1ee7f9fbe4191e9cbcf9be3343f4afe7c2b941
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a "PDF_SEO_LINK_FARM". The primary URL, https://maypoin.ru/wix?keyword=magic+photo+editor+apk, suggests a lure related to software downloads. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further indicate malicious intent, likely involving phishing or malware distribution.

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://maypoin.ru/wix?keyword=magic+photo+editor+apk PDF link annotation
    • https://vabinori.weebly.com/uploads/1/3/4/3/134348027/fizulota_lezepuf.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/rg704ge/earn_free_airtime_kenya.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/71gdMi5/21905939175.pdfIn PDF document text
    • https://cdn.sqhk.co/risenulowo/UggShgn/kerala_rtc_mobile_app.pdfIn PDF document text
    • http://sparzha.club/cultist_simulator_achievement_guide6pgfl.pdfIn PDF document text
    • http://littlenat.space/morally_noun_formpz858.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/jezixu.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/tidigudetefumof/30_day_eviction_notice_template_georgia.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/free_lagu_ariel_noah_jepang.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/trumpet_sheet_music_somewhere_over_the_rainbow.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/jepoxixuxasupalazefuwodus.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/ancient_rome_crossword_puzzle_answer_key_ducksters.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/41363614029.pdfIn PDF document text
    • http://nadefivetokilak.rf.gd/60748209723.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_off0000c70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC70B 5196 bytes
SHA-256: ee0c17f24f804a9f60aec5a94d06e31dbd75c6b16fa68606188e6fe35fad2701
font_01_sfnt_off0000d8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BD 10412 bytes
SHA-256: 1272bf6ded7354f173668b3a7f30e502e41c50b51b2cefa2caf4bea09d1640fd

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