Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a61845b434d2082…

MALICIOUS

PDF

73.7 KB Created: 2021-02-08 01:08:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 616addec0d07aa100b511d349d5525a9 SHA-1: 87649a7a3ad695a97460e37c7c690620752a7a5d SHA-256: 1a61845b434d2082e1e9e48619f33b96f6dea459f1018d4579a0528824328401
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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.
  • 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://crophysi.ru/wb?keyword=dr%20martens%20chelsea%20boots%20size%20guide In PDF document text
    • https://kefavemi.weebly.com/uploads/1/3/4/0/134042724/843327b45bfa9.pdfIn PDF document text
    • http://shopee24.site/cs_lewis_of_other_worldssdfux.pdfIn PDF document text
    • http://consequences.space/chess_tactics_strategylj57v.pdfIn PDF document text
    • https://gafewabonir.weebly.com/uploads/1/3/2/6/132696171/6710975.pdfIn PDF document text
    • https://zezonusadife.weebly.com/uploads/1/3/1/4/131410479/xetori.pdfIn PDF document text
    • https://gitexapovaje.weebly.com/uploads/1/3/4/4/134464395/penusedejomek.pdfIn PDF document text
    • https://lefesime.weebly.com/uploads/1/3/4/8/134882546/835263695e.pdfIn PDF document text
    • https://wesoxuzepa.weebly.com/uploads/1/3/4/3/134372623/futakenutibip.pdfIn PDF document text
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/5c08a0.pdfIn PDF document text
    • https://funujitumim.weebly.com/uploads/1/3/5/3/135347265/72685037.pdfIn PDF document text
    • http://eurostore.info/mayabazar_telugu_movie_video_songs_freez2o78.pdfIn PDF document text
    • http://yachts-4-sale.com/ultimate_shark_simulator_apk_1._29pu7x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446259/normal_5fda3dcabd61d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/62691896920.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/best_android_root_apps_reddit.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_off0000e3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A0 5540 bytes
SHA-256: bb57b782409219cd935c03766db9e467922f818260d5446bcac4fb0f5fce9754
font_01_sfnt_off0000f650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF650 10476 bytes
SHA-256: 7778208ffb3debfc7691f6598b7f90834d0dad0e59b40267d29702bc0e659f51