Malicious PDF — malware analysis report

Static analysis result for SHA-256 434f1d8c26fd3cda…

MALICIOUS

PDF

79.3 KB Created: 2021-07-07 04:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a1f1be389af9e061f8f8648021712e2 SHA-1: 79290630945ee2d4bf0227fa67b9d67b5bd7ab39 SHA-256: 434f1d8c26fd3cdae51e835689a34e60753beb0fc6373dfd469255fef2973692
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF sample was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The primary purpose appears to be a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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
  • 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://ayurveda-shiatsu-nice.com/upload/files/16492380965.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/9730a6765a1376a41ce3841221123576/43998166681.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/f175debb747nbosfi3nesd99ak/62334487172.pdf
    • https://moraure.net/js/ckfinder/userfiles/files/78836964870.pdf
    • https://reparationmobile.net/userfiles/file/pawowusexetaxudikeboda.pdf
    • https://adasms.fr/userfiles/file/didipudoboravigilarewovej.pdf
    • http://alwaditrading.com/userfiles/files/10074822697.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160836259a99d1---82224475245.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/dacb2b8be846aa14b40fdc353975e95f/49052078620.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c191f184801---50621951317.pdf
    • https://dm288.rs/slicice/file/2760375890.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b2d35231---32603679452.pdf
    • http://kingalbertltd.com/uploadedfiles/file/rovulifikogowik.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/43895cff590aa8da751223b88f785562/renegiviwinupivu.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93821c8d0a---98458692462.pdf
    • https://heritagecambodiatravel.com/userfiles/file/xibanalirekepa.pdf
    • http://gleneaglehoa.org/images/file/65689001913.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/be51f0497fef742814692042a90281c4/lutezoduzoduxukiguwolu.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/9efce8f97721680e7560ea9ee8451002/xodovodinamunazijovax.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/3brihanftslpt6ha6ca68h53mj/59346463315.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/sato75noei3q54ci0rmmr13id5/51232735035.pdf
    • http://ccswcd.com/userfiles/file/zanugavufimulixuz.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/a27718131bd048f7be9864c3db92a2b1/tenotubesavadupinoni.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=ejection+fraction+higher+than+70
    • 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_off0000d22c.bin
2c44fcfbdbf1d5474afbc28c4f753fbd0cc422d3af76dedac314c72c7086635c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD22C 10684 bytes
font_01_sfnt_off0000eaa3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA3 16792 bytes
font_02_sfnt_off000102b5.bin
42b85fe02ee5270820d853d40c0222bc7b64a178e2fd3ece3a21b39a950449bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x102B5 17212 bytes