Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a3ad6add92084f…

MALICIOUS

PDF

74.5 KB Created: 2021-04-02 04:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 084cc58013812a4ee142bed09112d9c7 SHA-1: f1b1071ded9a1f7eb0ce94753818cb36998ef540 SHA-256: d3a3ad6add92084f3086162b89c09fe32b18294fe2b0f98c6814a727b45918e5
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a ML classifier as malicious. The ClamAV detection further confirms its malicious nature. The document body, though heavily obfuscated, appears to contain text related to 'Adobe acrobat pro export pdf to word', suggesting a lure to trick users into visiting the malicious URL for a fake download or service.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/award?keyword=adobe+acrobat+pro+export+pdf+to+word
    • https://cdn-cms.f-static.net/uploads/4392869/normal_6029a515a3a52.pdf
    • https://static.s123-cdn-static.com/uploads/4495413/normal_600118b147afc.pdf
    • http://kungfumalibu.com/56168775562ulna9.pdf
    • https://cdn.sqhk.co/jimevexir/ZZ7hhf9/tagabofewaxalofuze.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • https://cdn.sqhk.co/zegegajugot/9YhgsSU/84017948494.pdf
    • https://cdn.sqhk.co/zixajofazadi/bkjcghD/totori_id_cabasa_music.pdf
    • https://cdn.sqhk.co/zudilubal/jgjegcO/gopokurubur.pdf
    • https://cdn.sqhk.co/jatobeguji/gdHZhja/bexulubagipuxe.pdf
    • http://dirtygirl.fun/307805508404ssmy.pdf
    • https://static.s123-cdn-static.com/uploads/4371013/normal_5fff0dd34d471.pdf
    • http://tanitebose.22web.org/handwriting_without_tears_letter_worksheets.pdf
    • http://biotringel.shop/tisuromefebikagibaguris4vbbm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/61029698-3dd4-42e9-8079-881d49308606/dirt_devil_vacuum_bags.pdf
    • https://uploads.strikinglycdn.com/files/fa0d07ad-acbb-48cb-9c5c-3c40653f87c2/fugetapebavakazu.pdf
    • https://s3.amazonaws.com/figugipopar/the_sense_of_an_ending_plot_twist.pdf
    • https://s3.amazonaws.com/vezumobigodub/dikibegudulevisepatev.pdf
    • https://uploads.strikinglycdn.com/files/1db5f134-ae1b-40a8-aaf3-89ef35eff99e/arithmetic_and_geometric_sequences_word_problems_practice_answers.pdf
    • http://xuwuxubemepimox.rf.gd/68608220891.pdf
    • https://s3.amazonaws.com/lomiwexuva/busta_rhymes_anarchy_album.pdf
    • https://s3.amazonaws.com/kudowo/35774707524.pdf
    • https://s3.amazonaws.com/zafijukopa/rojeginagolezusufepu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d88d.bin
36e7e1d7f7ecbe5eb803327506dcc7f4ddbde59c8683976bb743532b3f1eba42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD88D 4860 bytes
font_01_sfnt_off0000e937.bin
c57447c7e3cde53d74fe7c338380f73c19c8f70e903105294b15e0e82818a61f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE937 11024 bytes
font_02_sfnt_off00010cf0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF0 4324 bytes

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