Malicious PDF — malware analysis report

Static analysis result for SHA-256 a628d1caca5060bd…

MALICIOUS

PDF

43.3 KB Created: 2020-11-01 07:11:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 76564c9881849e0b15d6c3332653554f SHA-1: b772ae4648a7b09c2249c2b076d848a1fd0fb138 SHA-256: a628d1caca5060bd916af7681e61662126a0ced47a6a33831ced15dbc35fd5b9
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though partially obfuscated, includes a URL that matches the redirector found in the heuristics. This suggests the primary goal is to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/aws?keyword=subjective+point+of+view+vs.+objective In PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/3912160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_5f90697182abf.pdfIn PDF document text
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/kubid-tujixikisafaror-wawubo-wivunij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423699/normal_5f9d4ec585485.pdfIn PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/gitonavamiwir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f402ba9e-6507-4ebe-a599-54de82ce99d0/rotoxado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dac99f63-1633-47d9-aa5a-3a3837cd9619/sipilimixarekina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10914e68-5aca-4109-b1c1-b32b852158c4/21041581685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c87c54-97c8-43c9-85d6-b2c057eb148a/luzum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2d3cbce-8036-4dea-85b8-551a04e32b7f/24573343826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/809a84f6-598e-4dfd-90c9-2e887e37a9ae/descargar_core_pride_uverworld_mp3.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F37 5056 bytes
SHA-256: 7fdd05f0b6784f6477b90beadb0df05b24be46d942a0c5dfc9b7cfb43d345207
font_01_sfnt_off0000709d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x709D 9792 bytes
SHA-256: 0df80f69ea175d8e2d92452a566455481fde1bf684622b0d674713da0e9e28fb
font_02_sfnt_off00009214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9214 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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