Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0199025bd12acb…

MALICIOUS

PDF

123.4 KB Created: 2021-06-27 01:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2dab13ba0b7365a196f655c0cb9d91a8 SHA-1: 805f74214b1bce533de9e22b1aa07bf18cd33ca8 SHA-256: da0199025bd12acbbd661487c6c3e171bfe0e1bdecb2ead1c3b08726e450dbe9
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with numerous URLs pointing to compromised CMS upload storage and disposable hosting. These links likely serve as a lure to phishing sites or malware download locations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/6f2b8cb7cbc7b734947c473ca389dae2/99059197055.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160affdfb1a0cf---dolizamuwiwele.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160820b55d7928---41379605604.pdf
    • http://golden-candies.ru/webroot/files/files/5050899316.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e84873431---50546524571.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/57df8a6b50ab98f5271c39d5103f39e6/87759958598.pdf
    • http://aihyang.com/userfiles/file/7218306554.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/p6gfhman06ok9ekecqt6tus4i7/zofapumar.pdf
    • http://ilyxrace.com/userfiles/files/30082178899.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6e37c2246---risinofajejozevuteva.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/dd4458huqvf0s2oe3l5031l03b/12052680533.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/mp91et1464ip7g8q36nta1itv5/49785678607.pdf
    • http://bukharaalpharetta.com/sites/default/files/file/42696133580.pdf
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/sifemobekise.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/8ab36d148f44040a195046a6946f3bf1/3930907969.pdf
    • http://www.siposferenc.hu/html/53810385003.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98e131765---83032289048.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/a8b0856777a8e1d6f3de968a4d6e26c9/zisuvolelajirepubav.pdf
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/lesetoparinej.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607aeddbc2b31---688441424.pdf
    • http://novussiteyonetimi.com/uploads/file/nepigewe.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adab75aa91d---71547460893.pdf
    • https://2acontractor.it/images/file/82510267873.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=risk+of+rabies+from+dog+bite
    • 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_off00017ee2.bin
3c073bb655f495993c684ae48d2c67fc0789cafc6a7c7a9fac474e53469d536a
pdf-font-stream PDF embedded font (sfnt) at offset 0x17EE2 10824 bytes
font_01_sfnt_off000197b7.bin
a7fd63eed47e6a458e36141e5728f44d79a284b19f77a7a6ab4263d23fefe355
pdf-font-stream PDF embedded font (sfnt) at offset 0x197B7 19052 bytes
font_02_sfnt_off0001c83a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C83A 16792 bytes