Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80fc3865c492ca8…

MALICIOUS

PDF

68.6 KB Created: 2021-09-25 02:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d11815efecdd99511b9bd13581bb3f43 SHA-1: dd700b5c67d31a27b0fc7ba49043774421a6dbbf SHA-256: b80fc3865c492ca8a3dbc4b6b280d947dbe077ab3524167994118a9c95c6062b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an image-only design with a clickable action, typical of attempts to trick users into visiting external URLs. The numerous embedded links point to various domains, many of which are likely compromised or disposable hosting, suggesting a campaign to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/36887815937.pdf
    • https://www.profiemg.cz/upload/ck/files/zabeburetus.pdf
    • https://organicearthfiji.com/documents/file/3849802577.pdf
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dogozunogezatovez.pdf
    • https://vyaspublicschool.com/ckfinder/userfiles/files/niromamepolimusawu.pdf
    • http://skpizzasubs.com/uploads/files/zuxagaxaganimuder.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/d1a2cba7932fad1e57e3c4b296ed4425/20694420082.pdf
    • http://girisimcilikproje.com/resimler/files/48643648483.pdf
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/33947136651.pdf
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5673290233.pdf
    • http://change4best.ru/upload/file/dexipol.pdf
    • http://ukwoodrecycling.com/userfiles/files/57882075695.pdf
    • https://kitapkapla.com/upload/ckfinder/files/rowefepodaxezuzi.pdf
    • http://metabolitplus.ru/files/file/58753146611.pdf
    • https://thietbigas.net/media/files/97814580077.pdf
    • http://truhlarstvi-strakonice.cz/files/file/87136329752.pdf
    • https://cityface.cz/res/file/tiruxoratolitif.pdf
    • http://koryosushi.com/uploads/files/33966597121.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16145dbc28a9fd---31201895255.pdf
    • http://merlegdoktor.hu/tmp/rezezazavenidufusotoxapu.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410f783cdad---fepunikaxerufedevuwog.pdf
    • http://newabel.com/ckfinder/userfiles/files/nizolubaju.pdf
    • http://pinxedien.net/upload/files/surovofobusuwexefudu.pdf
    • http://sfalojistik.com/userfiles/file/xamorurom.pdf
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/genavaxitafaga.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=password+protect+folder+on+android
    • 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_off0000b10b.bin
f0d65b6aa8e0aafbf1171fed77641383e8c0a0879a2d754e12e54465d1890f9b
pdf-font-stream PDF embedded font (sfnt) at offset 0xB10B 10700 bytes
font_01_sfnt_off0000c9c6.bin
c56c4025d11bba38e93edbc1dffadaeb807a7d6bc94ed6ea18b8c0825db6d3f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C6 13972 bytes
font_02_sfnt_off0000ec7f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7F 16792 bytes