Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2ff029b3948dd0…

MALICIOUS

PDF

82.5 KB Created: 2021-01-29 22:59:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d89959232e0a9960a7ea130263139329 SHA-1: 807c44e8062720444c5811312392e24bb6daf71c SHA-256: 7e2ff029b3948dd0db60acd0959bf7cd03f983b5671c111ec5a28a4b23cbef1e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. ClamAV and ML classifiers identified this PDF as malicious, specifically flagging it as a phishing trojan. The presence of numerous external URIs and the link farm heuristic strongly suggest a malicious intent to lure users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/123?utm_term=icivics+judicial+branch+in+a+flash+answer+key+crossword PDF link annotation
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/a138860a3345.pdfIn PDF document text
    • https://wudumimimi.weebly.com/uploads/1/3/4/3/134356267/1ed601d67b4.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/gcBhidy/66855499310.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/qhf6o7w/fox_deportes_live_stream_free.pdfIn PDF document text
    • http://orbitan.fun/kanto_guide_pokemon_revolution92k49.pdfIn PDF document text
    • https://fazolusafiwef.weebly.com/uploads/1/3/4/5/134585025/banazu_luxixifig_farofe_fupedukijegor.pdfIn PDF document text
    • https://linezajokopu.weebly.com/uploads/1/3/4/6/134629872/4928081.pdfIn PDF document text
    • http://ratonawe.iblogger.org/python_3._7_mac_os.pdfIn PDF document text
    • https://xudagemiribu.weebly.com/uploads/1/3/1/3/131378943/galib_dedoguzonirag_suxedegudineva_zosiriluwetumed.pdfIn PDF document text
    • https://dagigofeno.weebly.com/uploads/1/3/4/8/134887245/de5f570fd.pdfIn PDF document text
    • http://hookup756.fun/oceanhorn_2_switch_release_date9g6br.pdfIn PDF document text
    • http://silkhfig.bid/31940323176nefek.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/Pjdsgfq/lefewadovezaxovomanuzop.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/kabarak_university_admission_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/gufipanogeb.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/wikexarodujuri.pdfIn PDF document text
    • http://gugamofizuxeg.epizy.com/8502473203.pdfIn PDF document text
    • http://doroxokile.epizy.com/56534252237.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_off0000f583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF583 1644 bytes
SHA-256: 37c24baa18d0073ec8030c3588704cc78396206b8b2b974af8757a8904f74525
font_01_sfnt_off0000fdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 5580 bytes
SHA-256: ad9396db7266a5c42065ebefc726bab0e06e2feceb192dd09143eb73f4efec76
font_02_sfnt_off000110cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CD 12616 bytes
SHA-256: 624c0114f884ba656792c6e901291b26afb0e892ddc594bb880e61272a34b9df

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