Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4cd48132607723…

MALICIOUS

PDF

127.3 KB Created: 2022-05-22 15:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: fd0850fba3110560409f5544c9bde420 SHA-1: fe569d96e9a830668554439cbc5d0edb3ee6fe78 SHA-256: fb4cd48132607723169f640c1ca4f12a293ce948133f7fbf38f08a4d956632fa
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://yubit.co.za/XSRYdR1H?utm_term=dark+souls+3+side+quest+guide+list+printable+pdf+template', which is likely a phishing lure. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of the malicious URL strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9834

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://yubit.co.za/XSRYdR1H?utm_term=dark+souls+3+side+quest+guide+list+printable+pdf+template
    • https://walixumalavi.weebly.com/uploads/1/4/1/2/141285516/7dd5755d3428a.pdf
    • http://hoangminhceramics.com/app/webroot/uploads/files/nakenakol.pdf
    • https://foxuvaduxajuj.weebly.com/uploads/1/4/1/4/141433066/juzawidagotojel.pdf
    • https://stopserv.ru/files/file/butite.pdf
    • https://xazojitov.weebly.com/uploads/1/3/1/4/131408465/2430846.pdf
    • https://rawavofim.weebly.com/uploads/1/3/1/4/131452817/4985092.pdf
    • https://mannlicher.hu/admin/kcfinder/upload/files/xesobezukon.pdf
    • http://hosteleriayvending.com/ckfinder/userfiles/files/nafomopesixunadufaxerube.pdf
    • http://zkbz888.com/uploadfile/file///2022050623443224.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/e532393670c17c6be48f3b4dcefd43cd/44772497912.pdf
    • https://mintedimages.com/ckfinder/userfiles/files/15719314436.pdf
    • https://ketawajizaw.weebly.com/uploads/1/3/4/5/134528489/jipivoju_dizitabu_batison.pdf
    • https://www.sterlingsez.com/ckfinder/userfiles/files/lubupovegevuwuzuwuleg.pdf
    • https://www.madrasclub.org/admin/attatchment/upload/files/lopiwuzefab.pdf
    • https://bivufinemena.weebly.com/uploads/1/3/1/3/131380184/4560968.pdf
    • https://sesifubonimexa.weebly.com/uploads/1/3/5/3/135317238/933376.pdf
    • https://junufapizu.weebly.com/uploads/1/4/1/2/141292215/tajarorerabaf.pdf
    • https://zelaoeng.ru/files/12678585898.pdf
    • https://gufonalika.weebly.com/uploads/1/3/4/0/134096228/nuwapugifudixes.pdf
    • https://bikerslegion.leszno.eu/userfiles/file/wexesefasik.pdf
    • https://voskovefiguriny.cz/kcfinder/upload/files/43895470733.pdf
    • https://officia.tn/file/86036319086.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/tr1adjqcuvo2cotmj4qiuq0be6/tuxetinenupexud.pdf
    • https://takewinedol.weebly.com/uploads/1/3/4/7/134768260/1379365.pdf
    • https://xabowiren.weebly.com/uploads/1/4/1/4/141443193/75f136d3ca6.pdf
    • https://kotogafisix.weebly.com/uploads/1/3/0/7/130740127/19a347f1d.pdf
    • https://dajaxevuluzege.weebly.com/uploads/1/4/1/2/141259681/towagobitate.pdf
    • http://www.naturhalles.fr/fckeditor/userfiles/file/vivudukowe.pdf
    • http://www.slenderclub.cz/ckfinder/userfiles/files/pafevotetenifudemujituj.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018d87.bin
3bc08efc96fccdf67395f33e8ef0ffa93c8ae035ed98fddee977667c44c50153
pdf-font-stream PDF embedded font (sfnt) at offset 0x18D87 17636 bytes
font_01_sfnt_off0001bbb8.bin
d57f55f6b80d93778dcf4239656c6432a5e0b516e1ebc2ec13c82b5fb6e61332
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBB8 11492 bytes
font_02_sfnt_off0001d632.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D632 16792 bytes