Malicious PDF — malware analysis report

Static analysis result for SHA-256 063da22f13265480…

MALICIOUS

PDF

41.1 KB Created: 2020-10-30 12:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8d90fcd391720a9e701568d158d744ba SHA-1: 3b6bc0904207409a9bb7ee3b024baf8ff2c01513 SHA-256: 063da22f132654804e007da5061dfce17ada23cd2c4d4e4d94ed2507c92beb36
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body and embedded links suggest a lure related to software serial numbers, aiming to direct users to malicious infrastructure. The presence of multiple external PDF links further indicates a link farm strategy, likely for SEO poisoning or distributing further malicious content.

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://cctraff.ru/strik?keyword=adobe+flash+pro+cs5.5+serial+number In PDF document text
    • https://wetejitaxazis.weebly.com/uploads/1/3/4/3/134306742/bosipalotetabuneki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5f91e1164b8ef.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/paxivogedewilu/gurexidilorikozolewilola.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/yoga_asanas_with_pictures_and_names_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/mypillow_promo_code_towels.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6596/6231/files/hma_pro_vpn_serial_key_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/newazudojifeladapurekone.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/busetevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46ab6f28-a756-4103-98b0-2f86a5080dd3/gadakowitaj.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_off000062b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B9 5680 bytes
SHA-256: fb4313c63baedf839434c543ce8e6a76a22d16b57e8566b0e194df83d1ae0b28
font_01_sfnt_off000075e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E7 9996 bytes
SHA-256: 1d7fcdc72ffdbbaf6decf5ed39ef3f5ccdf87527ec0b71c50daaa2e77cb1e768