Malicious PDF — malware analysis report

Static analysis result for SHA-256 acfd0a5d47303620…

MALICIOUS

PDF

100.6 KB Created: 2021-05-26 06:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2c9a0f198a62da7200eb2b1f06cfbb8d SHA-1: 900a6ff69e5609fe20108f82fd48932c95edaf78 SHA-256: acfd0a5d47303620a42d14d8b6f8be2f79686651dd16df2201bb9ae9922e3972
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing campaign. The primary URL, 'https://maypoin.ru/strik?utm_term=why+does+my+impala+says+engine+power+reduced', is likely used to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://maypoin.ru/strik?utm_term=why+does+my+impala+says+engine+power+reduced PDF link annotation
    • https://torosiwetub.weebly.com/uploads/1/3/5/3/135351177/1c390aa75156b.pdfIn PDF document text
    • https://zegosonov.weebly.com/uploads/1/3/4/1/134109065/9526096.pdfIn PDF document text
    • https://melijavunibujov.weebly.com/uploads/1/3/0/8/130873932/92772134f3a7.pdfIn PDF document text
    • https://gabofulonu.weebly.com/uploads/1/3/4/7/134730366/furebigalos.pdfIn PDF document text
    • https://lupuxamugegudi.weebly.com/uploads/1/3/4/6/134623484/rijumofuj-tililon.pdfIn PDF document text
    • https://sagagokibifaku.weebly.com/uploads/1/3/4/6/134625973/fa470a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456166/normal_603eb97225ce5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501804/normal_5fe29b8211f92.pdfIn PDF document text
    • https://bivixogerixud.weebly.com/uploads/1/3/4/4/134469213/kepoju.pdfIn PDF document text
    • https://nasolebad.weebly.com/uploads/1/3/4/6/134695036/3967908.pdfIn PDF document text
    • https://tumotasefon.weebly.com/uploads/1/3/5/3/135317172/811730.pdfIn PDF document text
    • https://falaxejuwutop.weebly.com/uploads/1/3/2/6/132681153/5146824.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/lagebutifotuviv.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/baaa2b339.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/111b0e40-9519-4609-aa58-c08bfe775ea5/pax_s80_quick_reference_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad046a4-14fc-4c6c-96aa-bcc90bfce3b2/poulan_wild_thing_chainsaw_carb_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ccbfa8c-50b3-4218-b1ff-2926c092ebd5/actionable_agile_metrics_for_predictability.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a94a44b-cfe4-4134-94a3-0514187270d7/pemanobededuzutakaguraze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fde8944-ef28-4c86-ab24-a292fc3ab42f/how_do_i_put_my_apple_keyboard_in_pairing_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/202e2f99-25c8-4a6b-ad4a-0379fcbd891c/sutokexuxemivejusutavab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55caf895-34c7-4409-a8e0-95b11b5f6434/the_chronicles_of_narnia_the_lion_the_witch_and_the_wardrobe_animated.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04cb83da-e95c-4181-8b8a-3eb3b6ca5552/76972433402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aeeb572-6fb3-4711-a981-6f176102d1a4/entry_level_qa_tester_jobs_in_austin_tx.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_off00014c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C07 5696 bytes
SHA-256: 949d911ff504ceba07d77b9078be38a55c4e5dca5c2465a2765d54cf77aa397d
font_01_sfnt_off00015f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F5B 11008 bytes
SHA-256: e8c01281ee41a780b82cee56e0333e3ed9cba5cdb19f6faa7ec5547f4c6a985c

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