Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d38b829d2c466a…

MALICIOUS

PDF

86.7 KB Created: 2021-06-30 03:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83fae44ec31e06215aedf19b2889c559 SHA-1: fe3ea8f000744d30c2ee671cd026f8901902f419 SHA-256: d6d38b829d2c466acd2ef6f8ab109d64b8828ada6d482fb03c31d7652cefee07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link farm with numerous URLs, many pointing to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or serving malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://saikunghouse.hk/userfiles/34728376853.pdf
    • http://steakclubhn.com/campannas/file/nepit.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/9dac33465fb15a9893d38b8940add9fd/wepinuvuw.pdf
    • https://cortemadera.com/wysiwygfiles/file/8517848676.pdf
    • https://777mto.com/contents//files/94232412757.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607943cbc7d1a---54556713934.pdf
    • https://electrabicycles.pl/app/webroot/uploads/file/16207398773301.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/msfs9ukckmaqe9njhiilmrge56/76685626811.pdf
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/88563569003.pdf
    • https://faprosid.com/file/92053436052.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/ia1mhe4g4dcp7gcngass1miit2/kamifaraf.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d1e85d3508d67468030bf548e3805c0f/bupoxakezosejorasas.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/989f0d32ad017a7201c07974943e8736/56850464672.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/rupimozifewaruses.pdf
    • http://nicolalazzarotto.com/userfiles/files/92923259283.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efdcea7cb4---mudesiworewojuxavaba.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/c06b754f576ee93d37f33f9726466e15/64603402479.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/nr2r4afjvrkikcvlplrs458d82/zomuwazamolavojorevosaf.pdf
    • http://qunjl.com/userfiles/files/35626989595.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f128067d3d---jikovu.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c66bd71c3---kobawikerurebijifaj.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf5694a736---nidawatujukused.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160becc9d21a0d---54850389825.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/d08b4e88e5ba9c1d097d2fe2e9aa9215/410464808.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/2cf8f1e4cceebb4b0b1059c7dfd96906/49618160956.pdf
    • https://dialogueinpraxis.net/files/docs/9068138756.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=game+riddles+with+answers
    • 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_off0000f096.bin
89555fd3c69dcd56d50050467f04ea9ed725c886941d6b00148722a9990ce64d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 17232 bytes
font_01_sfnt_off00011d94.bin
035fb7d78a5304286659018d4dddd31a40f05876ee04d364cf0a0aaa015d7cd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D94 10516 bytes
font_02_sfnt_off0001355b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1355B 16792 bytes