Malicious PDF — malware analysis report

Static analysis result for SHA-256 9348d6f27a9fd109…

MALICIOUS

PDF

37.6 KB Created: 2020-08-14 15:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6dd2e40f0282fb211b3c7d283521285 SHA-1: 227bbeedafc47f32cc688c00dc9593c09461f5e1 SHA-256: 9348d6f27a9fd10948011a3ad812d79976673dc9a09ee4a316ee3a95d2753a9d
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body text, though partially corrupted, includes the phrase 'Karvy fatca form pdf', suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ttraff.cc/pify?keyword=karvy+fatca+form+pdf
    • http://files.outstandinglibrarian.org/uploads/1/3/1/6/131636914/gazugus_zugokezinu_bapegusonulog.pdf
    • https://cdn.shopify.com/s/files/1/0432/3429/5966/files/38868761163.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0133/files/rafunelitapi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/85676420056.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2394/files/20741612699.pdf
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/latest_railway_reservation_form.pdf
    • https://cdn.shopify.com/s/files/1/0451/0108/8921/files/femutiwitetoritaboposofaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/9468/7400/files/asidosis_laktat_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0431/0528/8352/files/losulufebimaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/35725338633.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005813.bin
ab852a01101d46b6c381d059d20e7bd432b4af92d7f54b2f5da11638bb8b2785		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5813 5220 bytes
font_01_sfnt_off000069c7.bin
9574ccaad9907830f429f9ad14cd8b9baa59d95aa7bbf5362d01a8d1c57d2348		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C7 9600 bytes

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