Malicious PDF — malware analysis report

Static analysis result for SHA-256 806644602fb2e6bd…

MALICIOUS

PDF

130.8 KB Created: 2021-07-08 16:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3ce6ad4809a29c25822a443e398a22e3 SHA-1: 2e02b394661181d5e26aac7624c4e77b3edc51b6 SHA-256: 806644602fb2e6bd2e33018ad5681c07ec58c94e1b3699cf049c491953295caa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the 'SE_INVOICE_LURE' heuristic further support this, as the document likely attempts to trick users into clicking malicious links by impersonating legitimate communications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://wastran.ru/uplcv?utm_term=wages+under+the+payment+of+wages+act+1936 PDF link annotation
    • http://sistersaviopublicschool.com/userfiles/file/62133851663.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099cdcdbd562---1254387093.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/387873571.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609412a130bd2---mekenagebi.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/12187317042.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/pafoxiwafoxetinofukel.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c82078ddf6---35559429824.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/74c7ede997a6d83ebffc5f584fc1afd0/nexogobakazabi.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160712deba53ef---73833577799.pdfIn PDF document text
    • https://peterdegendt.be/file/dejojos.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/24541117721.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a70fbb7e02---zanulefof.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/20629731255.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/01f9f6b7b75491e7985565a14b9b5178/bitidasepapalosudelabokup.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/36921d56c2aec9266b458423d1163278/logiluwojaxapujade.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/c29bf6fd0db5104b81801ddbbda73f5f/pajujepuwuwodatebimijo.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/s9enroh7dvdj87oa4ponvmclg1/zaluzigadolupabugoxaj.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/475075697eb8077d9ec7559bd5471b7d/govubolafuxode.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/55369887456.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/1jmd7klupj7c2mq83vpfvlqvph/nojuribanopedijavopel.pdfIn PDF document text
    • https://kuepancong.com/contents//files/vudeveduxin.pdfIn PDF document text
    • http://abc-tel.ru/data/File/60752973673.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a38e1cd688d---64915391463.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c18dfe5f693---tafanasoxisemosokejumufe.pdfIn PDF document text
    • 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://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D9B 16680 bytes
SHA-256: 7c92148a0b965704129e39ada6cac06249bc9702e06778b671c633f933a21541
font_01_sfnt_off0001c948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C948 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001e15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E15F 11784 bytes
SHA-256: 4158b524fd9fb4f63171a08ff2d5cdd72a7d931fefc8d1f9574770a5b7a62c17

Open this report in the interactive analyzer, or submit your own file for analysis.