Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1aab097cbdb73f…

MALICIOUS

PDF

85.8 KB Created: 2021-05-01 02:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dab790bf22558d3908aff4adfbfdb61a SHA-1: 9b50f74a4c20c47c06f88115087cdffcbec5497c SHA-256: 5e1aab097cbdb73f39de4ff2210225dcbb6ce2986c181c0fd28cb3d34701e22c
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised WordPress sites, suggesting an attempt to host malicious content or redirect users. The document body contains garbled text and metadata, but the overall structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d855c7e647---limonujenigumazaromo.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/4694afc57dd77d3064aa058c0966394d/43111120899.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1b0ad7484---16632899035.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160772a7f3dd42---27175546131.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/oosc6u07nqk02msciin0afc061/ropiwijuvufiwedag.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c888f312a9---91000168432.pdf
    • http://aj-logistics.com/stock/userfiles/file/40578502645.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606da141c7299---muvarabeloxufosojoj.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/03fc40f59f6ca0f993b07fa81d325940/75066827470.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160851e7b42d7c---malepegadomojirowijelon.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/6ufdpvmq7fkqscdiu9kc1tbug4/tumodalawamox.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a734919daa---muxibe.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/cb7i38nhv36vd3j7t04vuijrv0/kupikesozuwotuvol.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/7eb6b62ad91f660907877445fe5b8513/59091988132.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/3d1c005be41dd493b841cffada75e8db/92263756519.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5d3abc93f---49519822313.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/701j1amql7p3fesrpfk61r3l05/66836086114.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/afca331f1b550483685d32d09a270564/12772275364.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=bhojpuri+song+kamariya+lollipop+lagelu+remix
    • 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://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b5.bin
08a14b251a24fa6611f0fa572836ec7301d9da77dc6d828f1ecdc049ef5ace35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B5 5592 bytes
font_01_sfnt_off0000fba4.bin
20d3c4b1215cda59e5a82bc3fd5916ed93a44d39ec9bd6da4ad19b6d2ee65245		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA4 5636 bytes
font_02_sfnt_off00010e29.bin
73083cf8b7e42f6011e7ad76fe860e1d677309a5e8e44ccb091f02fa231fe14b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E29 9484 bytes
font_03_sfnt_off00012e33.bin
a765e20ff509945ac313417ca2fe146922b13b79fbd6b19af359aa4c474c365d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E33 7860 bytes

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