Malicious PDF — malware analysis report

Static analysis result for SHA-256 59df22d1ccec3465…

MALICIOUS

PDF

81.5 KB Created: 2021-09-21 02:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6ed4d1d8671ada3a07aed9d2b4a5dc0e SHA-1: a20b553dcee636357807fc39d414547828cfbe3a SHA-256: 59df22d1ccec3465f34e19507b444a0901e23f6324ce1e8fe07d6493a2591aeb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, combined with the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic, indicates a phishing attempt related to fake lotteries or prize claims, likely leading to further malicious content or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://crysiq.ru/uplcv?utm_term=car+launcher+obd2
    • http://www.alcera.ca/userfiles/file/27637471586.pdf
    • http://yuilchem.com/userData/board/file/pajexolutotemafe.pdf
    • http://parfumerieindex.nl/images/uploads/siwumilakesupiwil.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/d267973d7175fae71748e423aadd64c4/tuwonematun.pdf
    • https://iqrainternationalschool.org/_assets/files/56108181764.pdf
    • http://nanopena.cz/upload/file/93833375155.pdf
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/51748025467.pdf
    • http://teraval.cz/res/file/sosonanorizu.pdf
    • http://rapabzenec.cz/obrazky/files/robetuxogusolazepadod.pdf
    • http://naitikfashions.com/ckfinder/userfiles/files/25046488284.pdf
    • https://implantsdentairesdesmoulins.com/upload/editor/file/vizalemix.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/161442c229e068---pitudabinevozabagow.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161476e77b3f9c---48320240911.pdf
    • https://wonwon.taipei/photo/file/28639508037.pdf
    • http://www.look4job.gr/images/_user_na/file/nufesevamazololefibugaseg.pdf
    • http://autosoftware.company/autoresponders_images/files/talewizedomuv.pdf
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/jetimonaronot.pdf
    • http://slbreakingnews.com/ckfinder/userfiles/files/nawureruwepijar.pdf
    • https://pabxlg.com/userfiles/file/94487206924.pdf
    • https://muacash.com/webroot/img/files/galenalipotufekofafilaj.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/39f31ae31a1e695890d9972d6cb5d699/wosekore.pdf
    • https://balaji-technology.com/userfiles/file/vigesanelogolevuwu.pdf
    • http://biplano.eu/userfiles/files/xiwulevekuvim.pdf
    • http://arenda-v-novosibirske.ru/ckfinder/userfiles/files/pudun.pdf
    • http://roberlo.cz/www/files/file/53430848072.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16130be663594b---68010946985.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db08.bin
ca9bd5bb9fc413d2650cbda59fc3110efcee2b6ff9df62c49dd331fbaed62562
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB08 17508 bytes
font_01_sfnt_off000108c5.bin
1ebf69fca7a4f94cb48d2f1686608f378eb83837c81603f7efd1520ccfb1a40f
pdf-font-stream PDF embedded font (sfnt) at offset 0x108C5 10500 bytes
font_02_sfnt_off00012098.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12098 16792 bytes