Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f9d9fd4d276480…

MALICIOUS

PDF

86.7 KB Created: 2021-07-12 23:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6577c007d56fcc31ff71eab58a333242 SHA-1: 02ba33b019d79f026e6f65a8891ffad9578876da SHA-256: d2f9d9fd4d2764808d0cf0a35ce97d7212fc171c19093e6a8fe828212eb9e68e
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of a link farm suggests an attempt to manipulate search engine results or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://micast.de/wp-content/plugins/super-forms/uploads/php/files/fd8eh4u2hsnde446rhvs7k8kl9/gusugowazefatululijapixup.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac071b5078c---jumasedimonejizilemujuva.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6d8bde428d18fb68d89115a4338b620e/17960191926.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a36651b0c92---98540872257.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/k8cuj4ilgogi4mibojf9ecjouc/gugufalosidisofafevupopex.pdf
    • http://bannhuaduong.net/upload/files/rebiwawuxo.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/ssh43ltm5esmahusmp7pgtn632/68302900251.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a429235114e---52837734586.pdf
    • http://innotec-industrie.be/userfiles/file/bukim.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16098276df02e9---86908239172.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f01b82b25---jagiwarosubemilixepoze.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160da2891c8d53---4366257746.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079488c7333a---zinibijalusutedol.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/ks22cqfeugtg5cnu8hkap555j1/gopigowupetemop.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0794a96ea---gedavimufomivilexilugisid.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/141jhog9o7arh602pqehv6u1bs/mubudij.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c558bbdd35---45731203150.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d69f90fed2---suxotosigibewemakubol.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/694d75d250818c9edcf29731368f833d/72105617154.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a76b1375ad5---jixunebofivilezax.pdf
    • http://babamoleskine.com/files/file/90198163443.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/31c147ba4d357f50cb98354a2fb71968/39258692606.pdf
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/muwufowiwe.pdf
    • https://przyklejki.pl/userfiles/fixomaberojunexufonipibu.pdf
    • http://alhouti.com/userfiles/file/5431391035.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=best+guitar+songs+to+learn+for+beginners
    • 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_off0000f0c8.bin
8faba45677f135710198b379da80caf95a022750727d8b749b5054d310b901dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C8 10684 bytes
font_01_sfnt_off00010972.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10972 16792 bytes
font_02_sfnt_off00012184.bin
c97ad7de10822de6e55eae5699701f1b097f6f8b347c80b72f8d10d24a1f09bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x12184 16836 bytes