Malicious PDF — malware analysis report

Static analysis result for SHA-256 db980116833c7911…

MALICIOUS

PDF

80.3 KB Created: 2021-03-25 03:41:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 364f1b448d2be628d585286ec1fd346a SHA-1: 33b4fc9aa5d827409cb14e522d9eeabdc4d77945 SHA-256: db980116833c791121f2dabec2e98638be7110a76b4258a4439d8eabe905fc77
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to generate traffic or distribute malware. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://seumenha.ru/wix?keyword=let+me+love+you+lyrics+ariana+grande+meaning PDF link annotation
    • https://bigevavez.weebly.com/uploads/1/3/4/0/134016854/7991449.pdfIn PDF document text
    • https://rasiguxi.weebly.com/uploads/1/3/5/3/135314707/1095954.pdfIn PDF document text
    • https://zakikubefetopu.weebly.com/uploads/1/3/2/6/132696201/1484288.pdfIn PDF document text
    • http://doxedisipi.scienceontheweb.net/ocupacin_reunin_oficio_profesin_trabajo_1_of_1.pdfIn PDF document text
    • https://pukaxonimuno.weebly.com/uploads/1/3/4/4/134435323/2889128.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/29e6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410206/normal_60353356253a1.pdfIn PDF document text
    • https://fumaletaseker.weebly.com/uploads/1/3/1/3/131381433/rofubamobepizu.pdfIn PDF document text
    • https://nusikunamapuger.weebly.com/uploads/1/3/0/8/130874430/9470de200f1c2a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404123/normal_603e855f8e119.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366965/normal_600299f9d119d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460678/normal_5ff3e6117fd6f.pdfIn PDF document text
    • https://fidenuta.weebly.com/uploads/1/3/1/4/131454859/5922399.pdfIn PDF document text
    • https://jijejadu.weebly.com/uploads/1/3/2/6/132683218/fisitovakepiza-zizalisux-zadiwofesuregiv-jorevonepop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463275/normal_6059531f36ce6.pdfIn PDF document text
    • https://gunajogozezulom.weebly.com/uploads/1/3/5/3/135385825/kalunizime.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446382/normal_5fe544398eaf9.pdfIn PDF document text
    • https://botapafejerevim.weebly.com/uploads/1/3/5/3/135317081/kezuwujis.pdfIn PDF document text
    • http://dududuw.mypressonline.com/zudarekesazubekelepavumu.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCE 5244 bytes
SHA-256: ac40d030c878b82c6ecb747f23a1d679c82890f4c10452d83151b7b435558e94
font_01_sfnt_off0000ff9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9B 11244 bytes
SHA-256: 67d76a1a62afd9e5e37e407f161d4ccb73c43498b57d2ffdd56d475b595f7672
font_02_sfnt_off000125c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C5 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71