Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8fc1102d237a38…

MALICIOUS

PDF

98.3 KB Created: 2021-07-27 00:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b43b4787d22367d3266d07adebd618c4 SHA-1: 0a54410c0dbe0f92614987533860ef956d690954 SHA-256: 1e8fc1102d237a38667cd4e31e14dc131a5db17d5e89555b4beb0c0ce564835d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which point to compromised WordPress upload directories, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the structure and URL analysis point to a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9776

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://alakharia.com/public_html/userfiles/file/neliweten.pdf
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/cg1vf33ab6n3ofulcitvh09663/setewuli.pdf
    • https://plasy.com/uploads/file/53368955776.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/e52f73cc060d9c1f19cc4ec49c56b01d/98319455214.pdf
    • https://alamansyria.com/userfiles/file/37040242084.pdf
    • https://fratellifurloni.it/file/25969821275.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160720281e6b98---45108039336.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/7ssg2j4msulriipp3q7brtvnv9/98080655299.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ba675f0a5---dexof.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/b3f358c3e8c3fcff605fe7120ea509bf/40211642229.pdf
    • http://jnafarms.com/clients/864068/File/lelowimabedirodixojadonu.pdf
    • http://signauction.net/userfiles/file/43529720859.pdf
    • http://ozari-ua.com/files/file/72722773403.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d937ea79d0---vugikasuxud.pdf
    • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/tuxuratorurevuwusiri.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b63efc74ff6---19806934357.pdf
    • http://lhsclassof68.com/clients/73441/File/dipubotif.pdf
    • http://npas.ru/pic/file/damivun.pdf
    • https://rosycaffe.com/file/20483627113.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608831de62bff---xigib.pdf
    • http://geopraxis.it/userfiles/files/50290675691.pdf
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sizenokipigavomitu.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/tcve446ltplp5bj9hi6de3ph5s/moroketinejenonatami.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/p2n7ules13jenqh34v3ap8rtb6/jimafopem.pdf
    • http://architettosirocco.it/userfiles/files/94170094059.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082f5d470403---binedixujokukedawokal.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=s%C3%A1ch+methode+rose+pdf
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5de.bin
382c8a20acab870bc3dceacc55f9e315d4527c02726f785c0bf8039e10dd0e92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DE 10736 bytes
font_01_sfnt_off0000fe92.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE92 16792 bytes
font_02_sfnt_off0001169f.bin
f4708f660a695f5713b44914f03c8c15b7eab56dfdc9e9e0a540ba9982a5d7a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1169F 2840 bytes
font_03_sfnt_off0001229b.bin
c1ed9f15d472b1ea205b97b3e24bb71bfa61800f904708b4cd87635aac64bff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1229B 16456 bytes
font_04_sfnt_off00013939.bin
3d428b6a3fd9f96e84c602513141eba10fef7f342a55e69f79e7eaf6cd23a27a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13939 27004 bytes

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