Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e958579b9124624…

MALICIOUS

PDF

87.2 KB Created: 2021-06-27 00:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e1296777c9ea91fe049b7033dfb79788 SHA-1: 8b9b2cfbabe4e56a73d06f64fb78610419f995fc SHA-256: 1e958579b9124624b42bb020eb8d270edeaea8acd79fbf0cf2ead6d854e8d75a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://younewstoday.com/task/userimages/file/38567183816.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/7c4e850fa1011b5e247c51f78f5f4ec0/95723018296.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f89b96293---73280606482.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/0781bfbaf6daf62b5f547a98abc94cfd/sotasowatibane.pdf
    • https://textolinguisticsolutions.com/upload/editor/file/panonabavepuler.pdf
    • http://yuhongzg.com/d/files/16342878672.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a167552c3---fewisapipudisuxogijaxesid.pdf
    • http://adria-ex.com/images/blog//file/6835127385.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160910ca0c3be2---zijabuvilawubujozip.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/1hs3ebm1e8b3s9iepoarph1val/51483127893.pdf
    • http://ahcxdq.com/uploads/file/280327425662.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/vil24trb9r39ni87oe1fum07s6/84535737405.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/6mc9ebel6inc9l96uqk7ca7lp4/jenofila.pdf
    • http://sixtyguildersresearch.com/admin/photos/file/89945374753.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/86rut1lddmo4k77dhrlhv3s8m6/suledopiwipakojirofibunu.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6d926ff06---16888873226.pdf
    • https://mecaniquekd.ca/upload/file/jataj.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/5434dc874c44e74a95ed05308f031785/51879671820.pdf
    • https://henklinders.nl/henklinders/upload/files/18527751386.pdf
    • http://andlupa.com/userfiles/file/97489931055.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/b1eb2f50a0114f268b4484a83f241afb/xerupijarogokuwutelonat.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/91108763076.pdf
    • http://rheumatology.institute/upload/content/file/panegipizizerinixuw.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/5be1c777bdd900cdc86e63db916f5598/zolavadixikifinez.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=sad+quotes+for+expectations
    • 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_off0000f1bf.bin
ff2655c6996a46b01f448758df6539ab450921e8cf01d5a65174b41aa5d2e3ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BF 16712 bytes
font_01_sfnt_off00011cb5.bin
27abd7dcbeff01e771c803874f31b09a945b7c23bb0f993cb4480810925fe578
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB5 10992 bytes
font_02_sfnt_off00013624.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13624 16792 bytes