Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7f76a13532d5f4…

MALICIOUS

PDF

92.6 KB Created: 2021-04-02 08:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 54e7880ab30e9bea9dd21624772059f8 SHA-1: 5de78fff48244e2766a4779c6777d9e4751e804d SHA-256: 0b7f76a13532d5f4e4325c4db85da686573de7beb40e661881e524741b0fc050
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 0.9967

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://jottigo.ru/strik?utm_term=hermosas+criaturas+libro+que+lee+lena PDF link annotation
    • https://sekikeke.weebly.com/uploads/1/3/4/7/134739811/gipazufufuj.pdfIn PDF document text
    • http://wasodez.22web.org/47818787260.pdfIn PDF document text
    • http://fortysgjdk.fun/pakarisixikanozagiperic.pdfIn PDF document text
    • http://citimart.online/vietnam_furniture_industry_reportoaybi.pdfIn PDF document text
    • https://fefajuvojamunuj.weebly.com/uploads/1/3/4/7/134750085/tedatawuzufapixijoje.pdfIn PDF document text
    • https://padavosasosak.weebly.com/uploads/1/3/4/6/134632247/a924ef958.pdfIn PDF document text
    • https://cdn.sqhk.co/rigepasemapa/jficnTK/the_trip_to_greece_movie_itinerary.pdfIn PDF document text
    • https://medadafamu.weebly.com/uploads/1/3/0/7/130775854/9382584.pdfIn PDF document text
    • http://mestikon.online/tomozuz5im5.pdfIn PDF document text
    • https://fulotagefopag.weebly.com/uploads/1/3/1/8/131857199/8ba9b7f6f1fa9.pdfIn PDF document text
    • http://zopaxonurur.iblogger.org/born_to_run_1993_movie_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xodawakadude/ZLhcchh/dhoom_3_star_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/ntegjjc/i_ll_remember_you_lyrics_and_chords.pdfIn PDF document text
    • http://jopekefepokideg.iblogger.org/what_is_the_reason_for_printer_offline.pdfIn PDF document text
    • http://fineagencyy.com/husqvarna_55_rancher_parts_usedd3d9g.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/bDjfURr/block_puzzle_wood_pop.pdfIn PDF document text
    • https://japarikadag.weebly.com/uploads/1/3/4/1/134108792/betefajad.pdfIn PDF document text
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/gigisoje-kalesadav-mefipitazamiped.pdfIn PDF document text
    • http://instapriz.site/190249190785f7un.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CsaOhdD/77800013952.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zisibife.epizy.com/what_is_selective_coding_in_grounded_theory.pdfIn PDF document text
    • http://wosotufozutula.epizy.com/diwenevolaxoji.pdfIn PDF document text
    • http://lusiromipu.epizy.com/the_most_popular_song_on_youtube.pdfIn PDF document text
    • http://sosubixoza.rf.gd/blue_jackets_manual_14th_edition.pdfIn PDF document text
    • http://wilawinujedoj.epizy.com/cognitive_behavioral_therapy_techniques.pdfIn PDF document text
    • http://rowovotufuru.epizy.com/kwikset_smartcode_910_not_locking.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_off000128f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F0 5172 bytes
SHA-256: b53d8b8873e0fc25a1d00c58b7bd42c306dea5fa1dac73f1acd894ce488b93ec
font_01_sfnt_off00013a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6C 12368 bytes
SHA-256: 78a4485f656d27f844ea6f15bbb52965b892ff83d26cb1435f3a53e69275e47d

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