Malicious PDF — malware analysis report

Static analysis result for SHA-256 148ea3721fe01859…

MALICIOUS

PDF

60.6 KB Created: 2020-12-19 15:34:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d648fa609a3f746a4178763050cf19ef SHA-1: d24522ecafc33a31b21216806aba63ba6cc43734 SHA-256: 148ea3721fe01859a10b8d75f1cc0450d29ead4b79f99bf09c0859d94ec434f7
214 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 as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/aws?utm_term=informacion+de+la+aurora+boreal+wikipedia In PDF document text
    • https://zagukosi.weebly.com/uploads/1/3/4/3/134314994/663955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419836/normal_5fc10eef6fc51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403805/normal_5f9b7b134a987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489732/normal_5fb7eb2d92d1d.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/304b1823-b4cc-405f-bbc4-61de64143766/79011704982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/237afc88-635f-457a-b9e1-279086a498f8/englisch_abituraufgaben_mit_lsungen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbd4d69b-b8ab-4203-ba69-1b2c77ca0d6d/surojabexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d0b05ad-e3b7-4f5e-8cfe-5763d588535d/cyberpunk_2020_campaign_stories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2af31a-b3b3-4c36-8cb5-c2ba84c88445/84299132993.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc32ae812facd59cebbb095/t/5fc3d48bfa04221c719556f9/1606669454960/92268659323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e8751cc-7191-4bcf-a67e-68f17c9fc055/44356967968.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA951 5156 bytes
SHA-256: 6ecdb2f086c4bb8202c67f32045fec7ce4d7a85d353aa5f6045498c4f80d288b
font_01_sfnt_off0000babb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBABB 8560 bytes
SHA-256: 74b3a9ccbb3dfcbfcbe0004c739ca023e1d242bb7536df986df0f240d7cd6a0c
font_02_sfnt_off0000d7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.