Malicious PDF — malware analysis report

Static analysis result for SHA-256 1627fb513a8df983…

MALICIOUS

PDF

68.7 KB Created: 2021-03-05 10:21:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 942c49898b31720c76ab524c5faa70a4 SHA-1: a5458399980954504749a644bc71011995005199 SHA-256: 1627fb513a8df98385ce3242615d42f28f891361fd24298ca281d47f644fee28
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many of which are likely part of a link farm designed to improve search engine rankings for unrelated topics. The primary external URL points to a page that appears to be a lure for phishing or a scam, disguised as instructions for resetting a soap dispenser. No scripts were extracted, but the PDF structure and extensive external linking suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://jumiwimov.ru/aws?utm_term=how+to+reset+simplehuman+soap+dispenser PDF link annotation
    • https://cdn.sqhk.co/nivavepe/cEKG7Dl/91866765154.pdfIn PDF document text
    • https://cdn.sqhk.co/navozaxezini/XigOiiU/internet_reversi_free.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/heuBhjh/10038008816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466367/normal_6010ab65d5cc9.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/ieghhdx/blue_bottle_fly_larvae_for_sale_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/jBoMxge/71292648018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480594/normal_603091d34e84e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a190a31-7ac8-48da-80c9-cb455dd5f9ea/18599059413.pdfIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_fc2c881d61734a03a98390d01844977b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/42e87e32-5b3f-4202-8456-b00fb9019c0d/kinibewenabasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90edd2de-b826-4c3e-8fff-1239cdb332ad/24665440091.pdfIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_701945320fc14d5e9041b950c32134ef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ffb1c5-c171-4f9a-82cb-54408844a3e7/what_is_the_best_3_bank_battery_charger.pdfIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_6aabe1ece5cc447f9606684b9d5c50c6.pdf?index=trueIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_9d6cfc6b9b7b4edbafd081a7b90be815.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/83706efe-fab1-492e-83b5-6203722eb2d9/how_to_make_verizon_fios_remote_control_tv_volume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5db90fa-2281-4f4e-9c2d-2c29f9198f3a/norton_anthology_of_american_literature_shorter_8th_edition_volume_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10b3e344-3579-4acb-afd2-5c895a1d5798/wazerikesiloxabinerixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d700941e-90db-461e-9055-ab3ac9bb7ea0/bipokaxuzazalotokox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28d9acb4-24d7-450b-8cac-fcaa67a2f414/fofete.pdfIn 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_off0000d1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C1 5252 bytes
SHA-256: 5e639cdfa19987a8d74bc3978fafcf3d870da4a2ce78415c0acea5a299aa2c23
font_01_sfnt_off0000e375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE375 9916 bytes
SHA-256: 05c96a5db6dc83cb098d1ecac2a8a4af2ec52dae12dec4fafcdb99c7bb81a1e7

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