Malicious PDF — malware analysis report

Static analysis result for SHA-256 e173e70d6ebd01d8…

MALICIOUS

PDF

79.4 KB Created: 2021-06-26 00:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2618fbf2848faa538af1d09f8d2c68c SHA-1: 197165fb2b97a0d7726e09cd456c50c8779741dc SHA-256: e173e70d6ebd01d81b38e55f1d3d5ca3082201d03a15a1b1cdb4ca7d04c7909b
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as 'Pdf.Phishing.Trojan' and flagged by an ML classifier, indicating malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised websites, many of which are WordPress installations hosting PDF files. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd56fe3dceb---lasavizotoweji.pdf
    • http://alliance-ltd.com/userfiles/webanuzax.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/affa5396ef677b5ce91cf8033e193bf3/40649431457.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e73fef948---zivifebi.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/lgnacogifpi2k5uqngdeuhhst0/2069358895.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/67d50d4b48fc6a1b1b25e770526df573/fixumidepazifu.pdf
    • https://bahamianbrewery.com/ckfinder/userfiles/files/tuluzelugejefev.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70f7a349e1---posoni.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607300971ed86---zaxuziso.pdf
    • https://service-panev.com/userfiles/gukozurokotirodakasisuv.pdf
    • http://arci-mp.fr/admin/File/53990994735.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/2ebebc33924a8a79cbca27bc763d7b9d/fokexujababevibezesukitu.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856222b8b1c---didazipi.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a96dd2430e4---leguwipolewep.pdf
    • http://sacoorhealth.pt/site/upload/file/18184039266.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/r2j7fuge5krv050j415uh13bea/lirolenopimexukixosubo.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/48c4ac34c2552fe75611d4e68067f502/68857987562.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/1ea5ddfec954278ea319e492a22aa836/51310743597.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/mbf2f8m69jqd6c1saaubeqde5u/96319738615.pdf
    • http://drapikowski.pl/uploaded/fck_files/file/30229734047.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/04b8611769d68e52a2074ef7b926feeb/jesujarajefofabojafuf.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608166c2aecdc---64601808202.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160bd544d73339---6434464904.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087ed1ee351f---30694349377.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=sushi+rice+for+risotto
    • 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_off0000d29e.bin
9ac9ae57d29d5cd299c5a7340db600a01bb6c0abdd467b51297c3689eec74bb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD29E 10296 bytes
font_01_sfnt_off0000e9f1.bin
ffdf0cdfa59d4dbbb2f43204d578db2ce78555c2747f40dd7ec3b0707b458d96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F1 17516 bytes
font_02_sfnt_off00011870.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11870 16792 bytes

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