Malicious PDF — malware analysis report

Static analysis result for SHA-256 697acc563936be97…

MALICIOUS

PDF

69.0 KB Created: 2021-09-27 18:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 88d54031873cf7c8aebdb484f40fbe6d SHA-1: bc98546f2a8a363ae5bea7ac630fc919c5543bfd SHA-256: 697acc563936be97c283fdb1a93d88b36b3a667a400d79396db834c1e93d16a0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and a machine learning classifier. It functions as a phishing lure, presenting an image that likely conceals a clickable link to an external resource. The document contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to distribute further malicious content or redirect users to phishing sites.

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 http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16135aa2989e59---fufufewenajirunelisi.pdf
    • http://unionnutritech.com/upload/files/16732380034.pdf
    • http://xz-brand.com/ckfinder/userfiles/files/wekatamatawawopizedefos.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161435e6b3d6c0---40659261257.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b469749b4c---1396629827.pdf
    • http://falconfam.com/ckfinder/userfiles/files/kuvazunidunopuvo.pdf
    • http://brenno-tojestto.pl/userfiles/file/zonivipodijakifos.pdf
    • http://fw-simple.com/uploads/files/fevevagumasetada.pdf
    • http://alhambra.kopanramen.com/uploads/files/62475811812.pdf
    • http://daiichigroup.net/uploads/news_file/xupozokukefule.pdf
    • https://mimpiindah88.com/contents/files/zizijop.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16135d55ebaf9d---nimenowaravig.pdf
    • http://asiavent.com/UserFiles/file///40763191680.pdf
    • https://grupo-kayros.com/userfiles/file/xobinexufegotozanali.pdf
    • http://tns-china.cn/editor_upload_image/file/noligo.pdf
    • http://imi.vc/upload/files/96731589464.pdf
    • http://chetaomaynganhnhua.com/uploads/files/tepumotodorogozezizipedab.pdf
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/49497069715.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/5d9c3ced4691a45c536527f1a3d678e8/7468171071.pdf
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/70866625811.pdf
    • https://sanruouvang.net/images/uploaded/file/faworatofisukoro.pdf
    • http://auxerretv.com/content/public/file/vubajilowowo.pdf
    • https://eliteprotectiveservices.net/ckfinder/userfiles/files/fisulibevaderuxixig.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614023036f630---rezafapu.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144c5eea473f---vufawomisatitexeroniwaxen.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=advertisement+coming+on+android+phone
    • 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_off0000b172.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB172 16792 bytes
font_01_sfnt_off0000c984.bin
b8055b6213033ae0d00ca9b7d362d05275d3a642ad5580da52e18f001a62c046
pdf-font-stream PDF embedded font (sfnt) at offset 0xC984 14216 bytes
font_02_sfnt_off0000ed00.bin
e8ee85fbf4ae495fbf10a76c2696272f802984c6b691bcc811d8a41136cbdea5
pdf-font-stream PDF embedded font (sfnt) at offset 0xED00 10964 bytes