Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a0d97039f16173…

MALICIOUS

PDF

81.2 KB Created: 2021-05-15 20:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0960041c9cdbad6667cd9ac7ec611fae SHA-1: 566ecc183ecceeb56aaa39c420cae7cdeacaae3d SHA-256: 13a0d97039f1617331b5fd59e92712ec931762cffe5fb0640940cd3781d8d560
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 0.9998

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://fokemale.ru/strik?utm_term=nicomachean+ethics+quotes+on+happiness PDF link annotation
    • http://sbrf.link/pirenitjue6p.pdfIn PDF document text
    • http://sokfresh.fun/amazing_grace_my_chains_are_gone_chords_g4wpi2.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/sivefub_vuberu.pdfIn PDF document text
    • http://ca-management.website/the_crown_season_2_episode_9_castmuxrs.pdfIn PDF document text
    • http://goxuladajozi.22web.org/extent_report_in_selenium_java.pdfIn PDF document text
    • https://pipalilivo.weebly.com/uploads/1/3/4/3/134310902/166637.pdfIn PDF document text
    • http://wonder-ita.space/winiwazexhi2mw.pdfIn PDF document text
    • http://student-yurist.ru/incropera_principles_of_heat_and_mass_transfer_solution_manual5e1f2.pdfIn PDF document text
    • https://furiraduwonejos.weebly.com/uploads/1/3/4/8/134870793/malarazuk-sofogugomitig-dekolisudebejap-latoxeji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xikapewegoruzom.epizy.com/betrayal_at_baldur_s_gate.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/bifixuzosaxobukudokozi.pdfIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_d8570c2f14c64a91b613aa4a42ec3356.pdf?index=trueIn PDF document text
    • https://a1bd7baf-2de3-4c81-8914-4b74a732ecf9.filesusr.com/ugd/c89f15_7a98e958ce594c61b249c39f9b821a65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/badodemebo/talijojoz.pdfIn PDF document text
    • http://wuvadofer.epizy.com/69335224797.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/crawmerax_solo_guide.pdfIn PDF document text
    • http://wuliwopiveti.rf.gd/angadi_theru_hd_movie_song.pdfIn PDF document text
    • https://c96d0889-97fb-4213-90a4-a08ae01970e6.filesusr.com/ugd/ed32f2_7dadf9727c1a42c094d8522a0008bba6.pdf?index=trueIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_78b49f9b13bf4bb6b09dc77a3f46088b.pdf?index=trueIn 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_off0000f213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF213 5024 bytes
SHA-256: 02cf0b1e523a744cdf878a4c47e8307f3c45162c2532701c1283d61852e260c0
font_01_sfnt_off00010300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10300 10796 bytes
SHA-256: d2eca9b26db2910d729ca826e9d6d847cde35274727da8c7bb8f87e46b30179b
font_02_sfnt_off00012783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12783 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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