Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa8bbd4b54783cd…

MALICIOUS

PDF

83.1 KB Created: 2021-09-17 01:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a884569f63c0418c7bea26de1249857a SHA-1: d1453bc74bab79ef36a976a3fc84befa1a340412 SHA-256: 2aa8bbd4b54783cd4da52b063189aec371c9548887627ba2f1208372e93eb465
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. This script likely redirects the user to a remote IP address (157.230.241.115) which hosts another PDF file, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://orenprom.com/img/account/file/27272957314.pdf
    • https://sskundal.com/userfiles/file/livupefol.pdf
    • https://mimpidia.com/contents/files/vigaje.pdf
    • https://giaynangchieucao.com/userfiles/file/vupoma.pdf
    • https://shirbandifelt.com/userfiles/file/sixifasipisevigabaxopupiz.pdf
    • http://veitali.com/upload/files/nawazut.pdf
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/kujanojokutitewine.pdf
    • http://duonglaohanoi.com/userfiles/file/82590150899.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6f311984b---57511296939.pdf
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/7291840186.pdf
    • https://marmetal.cevhertemizlik.com/userfiles/files/9086752232.pdf
    • https://nyirfa.hu/uploads/files/31636412865.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16143b53699bd3---37935409187.pdf
    • http://sk4education.com/ckfinder/userfiles/files/kabovesedelogomelibog.pdf
    • http://48bulls.com/js/upload/files/88082535947.pdf
    • https://karapinler.com/calisma2/files/uploads/74705356386.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9f0f297c7---kijuk.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/1otjc0ds7dcs57n8ii9s56amfl/47098985616.pdf
    • https://casalindasbakery.com/ckfinder/userfiles/files/43167592594.pdf
    • http://vakaruinzinerija.lt/userfiles/file/xorukakekoxagekebogan.pdf
    • http://nanoservice.cz/upload/file/nejulesipebimolekapa.pdf
    • http://arohitourandtravels.com/userfiles/file/xugabenaj.pdf
    • http://www.tsahimmongol.com/uploads/images/files/dufopagituf.pdf
    • http://marktoby.com/akram/know_news/admin/userfiles/file/66112039581.pdf
    • http://157.230.241.115/image/upload/File/mesivokigifek.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=free+tv+shows+on+android+phones
    • 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_off0000e22c.bin
06d99ae467e8d6cc89a1063b16f375b476e269e96060a39f9958238e716f5e2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE22C 17548 bytes
font_01_sfnt_off00010f6f.bin
b62d6948c789864b2b55dee93cc456a6c31b27f0df9582a4acb2e6c3d2d2d4a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6F 10572 bytes
font_02_sfnt_off00012796.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12796 16792 bytes