Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e11a0de6dd8104…

MALICIOUS

PDF

101.2 KB Created: 2021-07-18 17:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: aa036cfaf1feb5f42acde6b6b905b6ac SHA-1: fa6dd3138e59a03bb11e6eaff050a94b37fe02d4 SHA-256: 69e11a0de6dd81041f84f633e04589686173f69ae23b4517f752d983a6c53d4d
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and raw IP addresses, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the heuristic firings and URL analysis point to a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • 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://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c0640b532c1---30662000196.pdf PDF link annotation
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ea6ea5119---98764045743.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cabb615734---8585467973.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/ruwopaxepuvafeb.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/8576782552.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/pulijuzumukilesesameze.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/65021147542.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/wotoxegatofazop.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a7035e5eaba---10448121749.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/bavevejizedapiran.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed2af09f9f---33934763520.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/28975422229.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/rc0ko6iq9ah4lsoq41mg5755s0/varinotelapofixixedazox.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/hm1bt9885ucgmsbhmg96q0r5mn/wexipinubiwisadapimenilev.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5d44d7994---nawiki.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/42884041533.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082faee2aa92---88694204678.pdfIn PDF document text
    • http://roocenter.ru/upload/file/gewenokuniru.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/97740221417.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/74ib10u8cb5knteo27til7cqad/22519823049.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607c574938823---62535704951.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/28698034693.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/wazuwetegurukevoxepixefa.pdfIn PDF document text
    • https://duzcanlargroup.com/Images/Media/files/pesimajujomomonolikefiba.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/vimorif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=csgo+knife+giveaway+2020PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11457 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C68 16224 bytes
SHA-256: 749d0e0a2ebbce6e3a842727ccefc785b5fde86fcdd6c62922dcb2c91ea58cfb
font_02_sfnt_off0001422d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422D 18460 bytes
SHA-256: 07e2440e3bed28f68cab62cc98d71b6e508cb0f4b1bb548d4bcc592ae6cd89d9
font_03_sfnt_off000172e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172E4 10776 bytes
SHA-256: 1da344976fc2f3385ac28378c02675497f92a4d7b07cb8835c4bda59b7baea0e

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