Malicious PDF — malware analysis report

Static analysis result for SHA-256 59598d963114a260…

MALICIOUS

PDF

97.6 KB Created: 2021-03-08 13:42:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 320f374180eff6d95355a8718f57fd69 SHA-1: 2dd59923cd80ade52871e6154675de858607e8b9 SHA-256: 59598d963114a26021dda260f9674d7c03115c89ee4d9470ad536131ae0c619d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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

  • 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://ponafet.ru/wix?keyword=copy+paste+fonts+generator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455883/normal_6034c04fd887a.pdfIn PDF document text
    • https://cdn.sqhk.co/kezomerameki/haONPVd/light_up_snowman_head_tree_topper.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/ziaIjgJ/samurai_jack_vs_the_dome_of_doom.pdfIn PDF document text
    • https://xunopigiwigon.weebly.com/uploads/1/3/1/6/131636761/kixur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_6044699653229.pdfIn PDF document text
    • https://piledefek.weebly.com/uploads/1/3/5/9/135966078/5782857.pdfIn PDF document text
    • https://cdn.sqhk.co/jilebodetifa/YtjdgjA/65594438070.pdfIn PDF document text
    • https://fagugirawax.weebly.com/uploads/1/3/4/3/134388021/nejatozesezodej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374198/normal_5ffbedbe3f947.pdfIn PDF document text
    • https://cdn.sqhk.co/dumudegurit/hbFePdN/iot_articles.pdfIn PDF document text
    • http://botomovosisivod.22web.org/52044278257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494149/normal_60279032b7535.pdfIn PDF document text
    • https://cdn.sqhk.co/felodunom/jyhecpq/crafting_guide_1-_99_rs3.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/8988734.pdfIn PDF document text
    • https://cdn.sqhk.co/wolowivem/ibQjegd/33386338738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459466/normal_6027e92e8e571.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/7ibCoji/cinemark_paraguay_precios.pdfIn PDF document text
    • https://cdn.sqhk.co/xixofivib/hcUgha6/71901649836.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kokasog.epizy.com/how_do_you_turn_off_car_alarm_without_remote.pdfIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_759cc0ce19c54f5387c57a6ee8e86ee1.pdf?index=trueIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_4fc07900478d4cee939638dc05ad9af4.pdf?index=trueIn PDF document text
    • http://bejofumojep.rf.gd/cfpa_europe_guidelines.pdfIn PDF document text
    • http://desabukil.epizy.com/sap_business_one_cost_accounting_reconciliation_report.pdfIn PDF document text
    • http://nepopujadulipid.epizy.com/19994067141.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 2960 bytes
SHA-256: 48eaca147fd861200fc0e0bf9438a78602f44a825eb69cc9aa352e671af916dc
font_01_sfnt_off0000f94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 5044 bytes
SHA-256: b698f635e497d97f562c64a910d3e805197e34c6fb5b97ae1836df6b7f595330
font_02_sfnt_off00010a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A88 3012 bytes
SHA-256: 926105aa17299f61443d87269aa5b3d48b6c47b22be95349f3986ec865f579a7
font_03_sfnt_off000116c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C8 15308 bytes
SHA-256: c91a64a762f4ab5d2fa6ca6eeec4d43fc562cd7b76a522301e86c2688b48d10d
font_04_sfnt_off00014881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14881 18304 bytes
SHA-256: 3ddf9d29fe3159e4e06ef2954f9ea1ea59af6e082b0176986b172fb8851ce30f
font_05_sfnt_off00016503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16503 7084 bytes
SHA-256: 5efa49f50264b6bf227bd05164cd2c148e78387e1ed7f36689adc8710e105618

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