Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e870ce36f83179…

MALICIOUS

PDF

77.3 KB Created: 2021-07-16 00:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dda23b9c3ae700009928a6dde1648edf SHA-1: b3d82a5bb24d7539d915b599759cbf6cece60045 SHA-256: 60e870ce36f831793ce8ef2215b126531658f8fbe2d9d27a79e92fe4fa08a1a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a redirector to malicious or phishing content. No scripts were extracted, but the structure suggests it's designed to lure users into clicking on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b857fad4cbb---80195336350.pdf
    • http://iglozawiercie.pl/zdjecia/file/dogifigawuluwemavano.pdf
    • https://machinex-machines.com/UserFiles/File/43993220239.pdf
    • http://kovacsoltvaskerites.hu/images/file/jimafudav.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5861a340582aa699b8fa86b64230e18f/24972735184.pdf
    • http://ifaistos.reality.gr/~triantaf/images/file/bidus.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bea671f0b8---16426713546.pdf
    • https://ludifrance.fr/userfiles/file/49882654488.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b340d6fbe---54544267100.pdf
    • http://ranjitabiswas.com/userfiles/files/74558952747.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/26db8bce78542c960e1988c76a5d0015/rugabaxaj.pdf
    • http://bwc.lt/i/jerixivorolo.pdf
    • https://watfordfairtrade.org/app/webroot/img/files/kumonasotela.pdf
    • http://harryreichert.de/uploaded_pics/News/file/bakex.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/069a9dfc2c25aa31299991cb4f91f12d/31854971559.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/bhfea7pgth96591qn35tjr6qa6/62744999805.pdf
    • http://fogathajtohirek.hu/fckfiles/file/juzukafumukutumepulupop.pdf
    • https://songhong.info/userfiles/file/68349200437.pdf
    • http://duszek-lasu.pl/userfiles/file/67301681224.pdf
    • https://baohohoanglong.com/userfiles/file/66971731906.pdf
    • https://adasms.fr/userfiles/file/lawalokafefebom.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/vamekivipoliluladavaw.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=go+air+web+check+in
    • 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_off0000cc58.bin
05df307e00c44a560cf7b7d7bb7f75b0a2776657a754b26ec6660de9d93e1296
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC58 17300 bytes
font_01_sfnt_off0000f8af.bin
58c6d2315221e5f66f89b31b9a657309772a924c47088c869cf7016da9909be6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AF 10372 bytes
font_02_sfnt_off00011023.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11023 16792 bytes