Malicious PDF — malware analysis report

Static analysis result for SHA-256 0996df8a6df4de88…

MALICIOUS

PDF

79.4 KB Created: 2021-03-23 15:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 184b52ea5150ceb14b0069bd01cb3b6e SHA-1: 0a4dd395ae835a7a71c1924d207bdcb2dc2b497a SHA-256: 0996df8a6df4de880bc73e5e87264d6ac1d28dac49f42423b8acba220dd64658
194 Risk Score

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. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/wix?keyword=root+for+android+apk PDF link annotation
    • http://tedalaz.66ghz.com/mepok.pdfIn PDF document text
    • https://fagutefoxod.weebly.com/uploads/1/3/4/2/134235025/41c44cacf.pdfIn PDF document text
    • https://sofeparevik.weebly.com/uploads/1/3/4/5/134517226/8508526.pdfIn PDF document text
    • https://jipoditilab.weebly.com/uploads/1/3/1/4/131407274/nemozezipeguji-wofiwiwevizol.pdfIn PDF document text
    • https://tobisimotar.weebly.com/uploads/1/3/5/3/135330661/murukugujuzazuvem.pdfIn PDF document text
    • http://gusevoxuzuwelap.mywebcommunity.org/are_parallel_lines_similar.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/how_to_reboot_comcast_x1_box.pdfIn PDF document text
    • https://bumaxaxup.weebly.com/uploads/1/3/4/2/134235918/4e91529e573b.pdfIn PDF document text
    • https://musevupuli.weebly.com/uploads/1/3/1/4/131438528/c3c338f.pdfIn PDF document text
    • https://xuzipitazejaj.weebly.com/uploads/1/3/4/7/134722028/bc7b06365.pdfIn PDF document text
    • https://dunokosira.weebly.com/uploads/1/3/5/3/135349308/e837e4c608a77b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/construction_non_conformance_report_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca744fa-29ef-4fa8-8295-ddaeb022cc92/48910848537.pdfIn PDF document text
    • http://jegovogetaferop.epizy.com/12077603850.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/36533153698.pdfIn PDF document text
    • http://tuvalej.epizy.com/fractured_fairy_tales_examples_cinderella.pdfIn PDF document text
    • http://gogulet.rf.gd/honda_hrx217hya_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2afa8f81-7def-4043-bbf9-f45ddd3ba76d/how_to_read_a_book_from_amazon_prime.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/life_is_beautiful_2001_korean_drama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d7dfc3-187f-4f31-b9ec-266d6b1e133e/zopivebepodumesisan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06babad1-54d6-4a2f-a96d-0de83f30a8de/64041299252.pdfIn PDF document text
    • http://gunexukod.epizy.com/calendar_template_april_2019_word.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/romunufefovududowoxesu.pdfIn PDF document text
    • http://lebusepuwiri.atwebpages.com/difivikosapobema.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_off0000f858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF858 4896 bytes
SHA-256: a89a6de0f06922198414e7ad317f3983f16b6990aac89beb82373bcd5308337d
font_01_sfnt_off00010919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10919 11516 bytes
SHA-256: 7ef2e5b584666fc6c6154d1a09b31e284e6d37620cb5cecaa3ae33ba05b59938