Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd0417c14450bd1…

MALICIOUS

PDF

92.1 KB Created: 2021-04-06 07:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 60385dafe52272aab56bb4791fc2c094 SHA-1: 9e3e59294be97cf17c4787c88631fe7463cc3d08 SHA-256: 8fd0417c14450bd1fbaa11662a9b38d11ca93019c5883c4535f676b1fb4620b2
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9996

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nipisod.ru/award?keyword=learn+english+via+listening+pdf PDF link annotation
    • http://verifiedbadges-form.com/90006168892ozms0.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/eLtes7V/marketing_plan_and_related_resources_needed.pdfIn PDF document text
    • https://lumodafudewose.weebly.com/uploads/1/3/4/4/134480169/gukakikajezapowexe.pdfIn PDF document text
    • http://changely.club/starbucks_coconut_milk_nutritionsrmz9.pdfIn PDF document text
    • http://coolvdomaion.online/dcs-930l_password_problemwcy4h.pdfIn PDF document text
    • http://maska-respirator.shop/wibapatiswxrs.pdfIn PDF document text
    • https://zuzuxaze.weebly.com/uploads/1/3/4/0/134040629/minitiruzumem.pdfIn PDF document text
    • https://fudidokogi.weebly.com/uploads/1/3/4/6/134603759/6259722.pdfIn PDF document text
    • http://4kuhd.me/punelewawovegat4mut.pdfIn PDF document text
    • https://cdn.sqhk.co/xenumobavun/eV4g1id/51454330844.pdfIn PDF document text
    • https://cdn.sqhk.co/zokoxirinuz/K5hiM7Q/soccer_star_2020_football_hero_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/Xsxjdgc/65095620514.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/micW7ja/90970483985.pdfIn PDF document text
    • https://durabikat.weebly.com/uploads/1/3/4/5/134512276/javuburuwid_muximi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b04b1d7-36f7-4260-adab-032a5971a008/sundance_optima_880_series_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdba5a4d-8e3e-4909-a808-300028218680/why_did_the_us_interfere_in_the_latin_american_politics.pdfIn PDF document text
    • http://giwibajoxuriges.rf.gd/tetawiweriwu.pdfIn PDF document text
    • http://notixowazi.rf.gd/rerusoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf209ef-685d-4d87-91bc-7067eb26bb67/what_was_the_american_flag_in_1776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d67e6f4-dcf7-4851-97bc-aee6bd1941b8/sazijenawofazalok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76378ed6-9a92-4ce9-af3f-8bd29ef6a7af/zaxbys_job_application.pdfIn PDF document text
    • http://bevonox.epizy.com/zagofebasibonedekizemowuf.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12868 5304 bytes
SHA-256: a2fc325631a2c6e70c27593682dcf13ca981a7d26b32c675cf821eec86a6bbf1
font_01_sfnt_off00013a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A7B 11504 bytes
SHA-256: ebdbf586153f0bd78c2523f6530a62a134af57e203de8abc0ba00366ea7f9835

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