Malicious PDF — malware analysis report

Static analysis result for SHA-256 9317a43c3d6a078e…

MALICIOUS

PDF

73.7 KB Created: 2021-03-03 00:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1b76594dc19d3a43c9b233cfb09b33bf SHA-1: 94051c1511e25533d2ac16c04736e35bbe234d32 SHA-256: 9317a43c3d6a078e4da67335c23c49fc1fe3d3b8323eba17f5ccdaf8f36ae763
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/wb?keyword=another%20way%20to%20describe%20over%20the%20moon%20cafe%20tacoma In PDF document text
    • https://cdn.sqhk.co/fekawitaxug/2uhhavV/live_tv_streaming_apps_for_android_tv.pdfIn PDF document text
    • https://pevetuximamit.weebly.com/uploads/1/3/1/6/131606263/wemipuribibomite.pdfIn PDF document text
    • https://wewiruvikaju.weebly.com/uploads/1/3/0/7/130775929/bumoxuxugevuf-gizizaduferoz-zawobikomuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476767/normal_602ebffc3968a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454968/normal_60291bd185dc4.pdfIn PDF document text
    • https://zekasujiminog.weebly.com/uploads/1/3/4/3/134366003/wupukopenodisopilo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5fd5f170c2420.pdfIn PDF document text
    • https://cdn.sqhk.co/rebabafa/hdmQzoC/xufitejurewakatezitelise.pdfIn PDF document text
    • https://cdn.sqhk.co/rukugewul/jeijgd1/modern_market_tchad.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/dDhz2id/oxygen_tank_for_sale_el_paso_texas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460450/normal_5fe655d9e5ed9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453326/normal_6001aa6620d44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_601495e434b03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_600ca8ca6c7d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473619/normal_602a10fc45590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427526/normal_603e5b032d151.pdfIn PDF document text
    • https://fobijolosa.weebly.com/uploads/1/3/4/7/134730704/2802697.pdfIn PDF document text
    • https://cdn.sqhk.co/mobubivifa/wicnUhc/new_minecraft_update_release_date_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34E 5612 bytes
SHA-256: 41dbd6bbdf61702609379af3896df09618e04f419f47d15195b84aad302ae0eb
font_01_sfnt_off0000f658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF658 10308 bytes
SHA-256: 8f52962cf87ae629804d61e7edff66201ba27a7571edad65e27da4a71590b1f4

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