Malicious PDF — malware analysis report

Static analysis result for SHA-256 602f5649a2628597…

MALICIOUS

PDF

119.8 KB Created: 2021-06-06 03:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aec5aaa2a3070c9d66aff2c2c97b534 SHA-1: 97cfe72b45312fd4011eeb741e6aada21ea5817e SHA-256: 602f5649a2628597d1925186e631f57e272d1908d37e5c7fe6b67597e2538583
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. One of these links, 'https://synerhu.ru/pbw?utm_term=complex+oracle+sql+queries+examples+with+answers+pdf', is directly embedded and likely serves as the initial lure. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9601

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://synerhu.ru/pbw?utm_term=complex+oracle+sql+queries+examples+with+answers+pdf
    • https://rogebupapopax.weebly.com/uploads/1/3/0/7/130739826/juketekoxoxuzog.pdf
    • https://bugigubagide.weebly.com/uploads/1/3/4/5/134586777/abc4416.pdf
    • https://luvupomadimudux.weebly.com/uploads/1/3/4/3/134350134/a3050490a9a.pdf
    • https://sojurepew.weebly.com/uploads/1/3/5/9/135992925/2168048.pdf
    • https://vajawopi.weebly.com/uploads/1/3/4/5/134597817/potoxake.pdf
    • https://wederubumojap.weebly.com/uploads/1/3/5/3/135393822/2454266.pdf
    • https://bimenejujuw.weebly.com/uploads/1/3/4/5/134592033/4ab9b8514f3ad3.pdf
    • https://nenomoxemobare.weebly.com/uploads/1/3/6/0/136010140/fobaji-xodorutediso-baxiwezufawe.pdf
    • https://cdn-cms.f-static.net/uploads/4393026/normal_6059c9bc0a310.pdf
    • https://vivagijep.weebly.com/uploads/1/3/1/3/131383698/kuzazedo_duvidizimax.pdf
    • https://cdn-cms.f-static.net/uploads/4470040/normal_604494db095e5.pdf
    • https://cdn-cms.f-static.net/uploads/4413703/normal_60491f95065b7.pdf
    • https://jiritoravusona.weebly.com/uploads/1/3/4/3/134371650/rolasotado_zufitem.pdf
    • https://falomomorojed.weebly.com/uploads/1/3/1/4/131438216/kawonezasozi-besova-juwomuvonosuxim.pdf
    • https://sipopupomiva.weebly.com/uploads/1/3/4/3/134307082/5e0a76ed508785.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/574a7501-ee4d-4f98-bde2-d05d5e6879ec/geometry_dash_lite_mod_apk_android_1.pdf
    • https://uploads.strikinglycdn.com/files/fa446100-eeed-44b7-b205-c640272182cd/29438095499.pdf
    • https://uploads.strikinglycdn.com/files/9406f1fe-512c-4be9-90d6-cdfd285c5ab8/wopabumerodaburavisukiz.pdf
    • https://uploads.strikinglycdn.com/files/f6742dcd-40de-4ff7-b153-f45316013b65/business_communication_today_book.pdf
    • https://uploads.strikinglycdn.com/files/4bebdf1e-c03d-4326-bee8-4af5f475bdab/the_magic_school_bus_books.pdf
    • https://uploads.strikinglycdn.com/files/7ded997a-cabc-43d5-a4ec-1f9566c3e0ae/73369259711.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019f75.bin
d3cff718aab758e8bfff32a88910891ce45c61d2a07cd7c13fb0f568893b5b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19F75 5588 bytes
font_01_sfnt_off0001b255.bin
f413a719d0186ada4b059a10700e40dfbf5fc2a83b5ba7262294018e8f10ebe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B255 11988 bytes

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