Malicious PDF — malware analysis report

Static analysis result for SHA-256 03001e0c185005b8…

MALICIOUS

PDF

71.1 KB Created: 2021-03-03 02:07:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3604a706f7b8b028d871c4381b894640 SHA-1: 700faf0ca53d7985c7f56e194d2872e846b16416 SHA-256: 03001e0c185005b8057f702921df8fe7aa26df2a08ddd3703c08897f0e0126af
126 Risk Score

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://dafemum.ru/wix?keyword=does+a+covalent+bond+form+between+two+atoms PDF link annotation
    • http://qrastenmap.online/the_royalty_family_calling_fake_video_call238dh.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/is_subaru_awd_good.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/how_to_check_the_transmission_fluid_in_a_2008_nissan_altima.pdfIn PDF document text
    • http://lomipojiposo.iblogger.org/what_kind_of_phone_charger_does_a_galaxy_s9_use.pdfIn PDF document text
    • http://rubisteq.online/types_of_nonfiction_text_structuresjibv4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405195/normal_5fcd377107e70.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/20739091669.pdfIn PDF document text
    • http://predouche.xyz/333379121700ov39.pdfIn PDF document text
    • http://itdiscount.info/28798947730j7ww9.pdfIn PDF document text
    • http://memowelubi.mygamesonline.org/how_to_reset_my_printer_settings.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/jeworurowam/capitulo_4a_actividad_6_answers.pdfIn PDF document text
    • http://firiwigisu.atwebpages.com/28707424006.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_off0000da0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0E 5456 bytes
SHA-256: 391b4cb2fa859474beabb21d44cd770ea28b3d3625e23810cb4aead294cf46fa
font_01_sfnt_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 10148 bytes
SHA-256: a85b253faa50bc393574477932a88f49c6af33b5738cf7d8f36361e250c8538d