Malicious PDF — malware analysis report

Static analysis result for SHA-256 334823ce4ca9bc3c…

MALICIOUS

PDF

69.9 KB Created: 2020-12-22 00:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 67a4ca096f025a20dc6eda2b0d9260ca SHA-1: 39d8c50f3abfed8d59d2f722d5079ec07682614f SHA-256: 334823ce4ca9bc3c544898912637e57c43de1fce88c94c92683f0afb81232134
254 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The presence of numerous external links, many pointing to PDFs, suggests a link farm or phishing lure. The primary redirector URL, 'https://traffking.ru/123?utm_term=gigaware+usb+to+serial', is a strong indicator of malicious intent, likely to lead users to a phishing page or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffking.ru/123?utm_term=gigaware+usb+to+serial In PDF document text
    • https://dubutabinagi.weebly.com/uploads/1/3/4/4/134441981/muzuzigajew.pdfIn PDF document text
    • https://buwabasowo.weebly.com/uploads/1/3/4/3/134353515/44fc5ef23.pdfIn PDF document text
    • https://basedupapopulow.weebly.com/uploads/1/3/4/3/134344364/nuxajuwo_gebedorazipu_silewamagafu_ruwumalowi.pdfIn PDF document text
    • https://bososafevibusup.weebly.com/uploads/1/3/4/0/134041518/nizomed_rukeziwesezesa_vedel_dupejobexugaxe.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/xakegagifilixig.pdfIn PDF document text
    • https://xesofizagib.weebly.com/uploads/1/3/4/4/134491847/ba3a5c3478ddb.pdfIn PDF document text
    • https://rebijigubewu.weebly.com/uploads/1/3/4/7/134770847/guvageteba-fojuxuzaturoku.pdfIn PDF document text
    • https://jasunibimagimuf.weebly.com/uploads/1/3/4/7/134733129/94850478b.pdfIn PDF document text
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/piwugomigupakinez.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/vezumobigodub/way_down_we_go_song_musicpleer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e464ab79f442f229936f/t/5fc16010f3de5e49b5980afe/1606508561086/sigavav.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a02ac30a162e0c579fed/t/5fc7c6503e96977c29c41041/1606927953180/bedetutesapamobozamanoje.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/advanced_sql_queries.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc312238ef7301f8b1ef899/t/5fc7746f5060c93fcd7eabec/1606906993773/61528820193.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe01210ff074777c98670da/t/5fe0d3cbe8c6996fea14fade/1608569804221/cdp_carbon_majors_report.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/pifijirurigugazilod.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/89164090497.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_off0000d634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD634 5116 bytes
SHA-256: 939592b13cfe367bc8ca50dad4a69607eeab0fc76444f97b09bcbf4b98631d25
font_01_sfnt_off0000e7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BF 10216 bytes
SHA-256: 7304b64984b1bdc7fde06b37766f6ce7473e29bdcde11d0d487af928b9031b3f