Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c676420e451ee5…

MALICIOUS

PDF

86.4 KB Created: 2021-07-06 18:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 015ebac0b5a56f01f95349b60d340274 SHA-1: ba91e4d0dfe5a421b47d91d882cfcc26c8e540ba SHA-256: 62c676420e451ee5573dbc5559bd4f0d87d1b63b5f94b9abf75b80d825115287
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting it functions as a link farm. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa4d625d92---nuxagikekaxizevesetejozi.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/d4f1bc1b5925adfe7571a5a2df5ae436/gilewakolu.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609798972512d---57748763963.pdf
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/66845245930.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/bhh2nu6k2snt3o2p5dut1v5l94/nevopuj.pdf
    • http://apexnepaltravel.com/userfiles/file/fiwesuzi.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7b87bf809---bobodunoselidekagav.pdf
    • http://thuephotocopytaihanoi.com/upload/files/20686061248.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/461550b36250feba97ebd5ed9d6263e8/bewexirovixiwisovuwip.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160e45055d9b41---midarupobozotavezubo.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcff1a6272---kazem.pdf
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/df87ae869e660672045541fff0d93a39/kekanafawokigama.pdf
    • http://stylekd.ru/files/bojobujiselu.pdf
    • http://xlsferrosilicon.com/d/files/pevadu.pdf
    • http://bahtiyardishekimi.com/fckfiles/file/72385635581.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2f273a07e---jezov.pdf
    • https://oddluzanie.net/userfiles/file/jiwetuzutotiwaputuwaki.pdf
    • https://majubesar.info/contents//files/60430821271.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/a455ddd716e0eeb8be05f224efca5ea0/94790878035.pdf
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/rovalejat.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3bdaf048d---savaleja.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/cgb9s5der1qql56t645ruplj91/86921300.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/gtcl3qlr6erih58gas57utrb0h/20665343775.pdf
    • https://irisapp.cn/uploadfiles/fckeditor/20210515/file/16210513019168.pdf
    • https://efnnma.org/files/file/71157560830.pdf
    • http://esipro.lu/userfiles/file/nurolisinov.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=mine+bazzi+mp3+song+download
    • 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_off0000ee12.bin
2a8a809ba8d5f6cd6d3aa48873441ff4bedef1f4b58c631b72455c6520be3582
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE12 10988 bytes
font_01_sfnt_off00010731.bin
b69903450b923a278c36b3eb3a6bc3b6b3cc809125cde46d7f70da77036efa2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10731 17096 bytes
font_02_sfnt_off00013403.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13403 16792 bytes