Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a1183a29e2c326…

MALICIOUS

PDF

93.6 KB Created: 2021-03-08 20:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d862980b0d5e15a188d10a3707e0911e SHA-1: ae602813ff01db3559a0be0b3b1bcc1d0dcb9d5e SHA-256: 17a1183a29e2c3265562fd3d916c7c252030000f0da0bba59b297ede00f2715a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The primary URLs extracted, 'https://druttle.ru/award?keyword=resume+atomistique+s1+pdf' and 'http://reform-st.ru/fonomafogadutosupejugucst9j.pdf', are suspicious and likely lead to malicious content or phishing sites. ClamAV detection and ML classification further support its malicious nature, suggesting it's a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 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.
  • 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://druttle.ru/award?keyword=resume+atomistique+s1+pdf PDF link annotation
    • http://reform-st.ru/fonomafogadutosupejugucst9j.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/0kP8zje/hd_dope_cool_wallpapers_4k_apk.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/dufuserewimov.pdfIn PDF document text
    • https://cdn.sqhk.co/dilujuzaga/jjihigm/flaming_core_mod_apk_4._1._3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/Aidmhj6/history_of_europe_book_series.pdfIn PDF document text
    • http://the-glow.ru/64187486767630k3.pdfIn PDF document text
    • https://cdn.sqhk.co/lupokuna/d8gg7gf/39110746903.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/fjegidu/draw_table_computer_definition.pdfIn PDF document text
    • http://xugaguf.mypressonline.com/month_to_month_rental_agreement_template_california.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/subject_predicate_worksheets_3rd_grade.pdfIn PDF document text
    • http://dimax-matrasy.ru/kugefaluj3kl6.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
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_fb57a4481a894e7582181f129877fc75.pdf?index=trueIn PDF document text
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_30c755f637304929834e8351fcea8300.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gapivegek/does_claude_frollo_like_esmeralda.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/52781940400.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/23475120319.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/intermatic_timer_instructions_dt620.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/87494179638.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/the_crown_netflix_season_4_rotten_tomatoes.pdfIn PDF document text
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_dcb4044edede4e649b37161544f10e52.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/what_to_read_after_mistborn_trilogy.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/les_diffrents_examens_biologiques.pdfIn PDF document text
    • https://1058d175-53f8-4d86-9201-ae9c1fc74009.filesusr.com/ugd/62a633_bf5992632455476db2e1fa48f7af101e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/what_is_an_180_degree_angle_called.pdfIn PDF document text
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_e96cfe4d11df439ca95852680ce70e26.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012e4b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12E4B 24812 bytes
SHA-256: 8dde9ec60468370e0ca9109ce1bf8beb67d0d075c63e880edecb7d660fb54b31
font_00_sfnt_off0000f253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF253 5020 bytes
SHA-256: 133f0a7b41947ef4d30c1b020b2a24e430b63d78119c1d99b4591c776c4e7e97
font_01_sfnt_off0001037c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037C 13588 bytes
SHA-256: 9e5ee1bc76b7db2c9d5ff733df51d2a6cb4701a73ea05d222bf0b0445493e80a
font_03_sfnt_off00015a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A83 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176