Malicious PDF — malware analysis report

Static analysis result for SHA-256 a28ba3a7d090b5a0…

MALICIOUS

PDF

68.1 KB Created: 2020-11-14 19:58:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b01170ff3dafa55a614243aa118c003d SHA-1: e7bb1bff0f542cb09ea01665529a2fd9238ddd1b SHA-256: a28ba3a7d090b5a0e277a56577d0a170d734a625c73ec17d27d16dd0bfa6e08b
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains a large number of external links, many of which appear to be part of an SEO link farm designed to redirect users to potentially malicious content. The primary external link identified is https://trafffe.ru/aws?utm_term=apollo+fire+alarm+control+panel+manual, which is likely a lure for phishing or malware download.

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
  • 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.
  • 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://trafffe.ru/aws?utm_term=apollo+fire+alarm+control+panel+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404738/normal_5fa5bacde8dcf.pdfIn PDF document text
    • https://sibojigejediwij.weebly.com/uploads/1/3/4/6/134606131/2876477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5f89ab0d26422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390328/normal_5f91e9398c3d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5f958b259dcc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481988/normal_5fac3f4861aa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385421/normal_5f97ae9fa0c39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421641/normal_5fa9d3a03270e.pdfIn PDF document text
    • https://vadutivolojogo.weebly.com/uploads/1/3/0/8/130813650/00c4cc104857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f930b0f27935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5f89b267e93c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420765/normal_5fa90e358ecb5.pdfIn PDF document text
    • https://lapamijivosesez.weebly.com/uploads/1/3/4/5/134507295/balimo-naxolirawakif-tokap-megogizuv.pdfIn PDF document text
    • https://xesilowavexaweg.weebly.com/uploads/1/3/4/2/134265648/7af18ee129830a.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/b8b0006f-4ee9-46eb-ba43-29e469e05e18/2426972216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/418d0cbb-c5c4-4daa-9f51-49563beee91b/pt100_diren_tablosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3dc2e8d-754e-476d-9484-7e8fc89052bd/big_sky_property_management_butte_mt.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_off0000cffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFA 4972 bytes
SHA-256: c7e92051b56b4db45ebd3f2ac97905f2c77ed30ba0147e55e6a35b2ff60a55ad
font_01_sfnt_off0000e0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D0 10180 bytes
SHA-256: da2819f06f8dfbb71d50b59e398afd690f0006546f31ada8348c72768a55e916

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