Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a0d881e434b86f…

MALICIOUS

PDF

88.3 KB Created: 2021-02-22 21:53:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 69d590b172bf5fdce6fa578cb7e298cb SHA-1: 9c0804739e9e92c12dcdaf431d1c0bc20b7f99e3 SHA-256: 14a0d881e434b86f53f94d3bed6513550ea87e910e8ada5851296fa2d38dfdbc
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, identified as a link farm, directing users to potentially malicious websites. Heuristics indicate the presence of redirector links and a general ML classification of maliciousness. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/strik?utm_term=healthrider+r65+treadmill+parts In PDF document text
    • https://kimuremosov.weebly.com/uploads/1/3/4/7/134732255/jorilesagota_roziwezalar_neberegofupev_pejuju.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/ALhigc9/army_parts_number_lookup.pdfIn PDF document text
    • https://cdn.sqhk.co/zazifutunoj/Dhi5jaa/tefopelunu.pdfIn PDF document text
    • https://nusisudarebo.weebly.com/uploads/1/3/4/3/134349377/zugumejofe_sutanuzup_nisuwozijaxas_lujikodor.pdfIn PDF document text
    • https://poliradu.weebly.com/uploads/1/3/5/9/135991332/5180328.pdfIn PDF document text
    • http://bipiraxas.iblogger.org/attendance_register_format_for_office_with_time.pdfIn PDF document text
    • https://kixofugowewo.weebly.com/uploads/1/3/1/8/131872146/diwisulidama-wewopu.pdfIn PDF document text
    • http://dejasis.iblogger.org/lajunomo.pdfIn PDF document text
    • https://cdn.sqhk.co/rinovizifim/dhingcZ/ezypay_plus_3.pdfIn PDF document text
    • https://piwevowukitibe.weebly.com/uploads/1/3/1/4/131454699/kapebiz-pakupazejuxepoj-siguserijapu.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/s1jh2f1/rojogiwubov.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/fefurorobumi/abcd_2_movie_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/ameba_pigg_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/75751738255.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/atlas_anatomie_humaine_2018.pdfIn PDF document text
    • http://javozajesaretu.epizy.com/yugioh_forbidden_memories_card_guide.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_off0000eb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7A 14976 bytes
SHA-256: b24f45552873fcb3add53b37d983d8b39780301f4d2a5735fe4b5e5c6b029b6b
font_01_sfnt_off00011976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11976 5440 bytes
SHA-256: 5055c8d2de453afa7d595627a80fa562bee121afcd3408ef5095b9d319246e73
font_02_sfnt_off00012bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBF 11216 bytes
SHA-256: 18b25671684f3434dafe776ac4519c22c0da623aab353eb6d1dba246348967b4

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