Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad2c5f6d22f35aa…

MALICIOUS

PDF

78.8 KB Created: 2021-03-18 20:04:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aa3b7d485265e6ad04df9fb1a83d0b4d SHA-1: 595070b4592a53ec1285592e613f6e49d97ed604 SHA-256: 9ad2c5f6d22f35aa4e4e9192b8308e5266845108a84c5f8fcf91cccf99969a31
66 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 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 0.9994

Heuristics 4

  • 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://fokemale.ru/strik?utm_term=irobot+roomba+980+battery+replacement PDF link annotation
    • http://fojefojegut.medianewsonline.com/acta_de_nacimiento_nuevo_leon.pdfIn PDF document text
    • http://rozewevojalel.sportsontheweb.net/xijedorifakejip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450139/normal_60321a1e581dc.pdfIn PDF document text
    • http://vijepuwobewi.mygamesonline.org/68235602868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482618/normal_603efea15e5dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374368/normal_5fc61120d5df3.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/what_does_seasonal_employee_mean.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/what_sandwiches_are_5_at_subway_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484612/normal_5ff830a10318c.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/kenmore_elite_washer_drain_pump_hose.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/598b39bb-058d-4c73-a3d3-8955bd55f6cf/niwedavadudigeropavefa.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/39813396019.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/canon_ipf670_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71f09609-6a00-4333-bacf-55ffea21725e/1719194595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce0edc45-94a0-4e60-89d9-cb5701142a80/62923514779.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/wosusolekilupofob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38836a41-b073-46c8-9601-9490f968ecd8/xizuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37d45d92-f74d-4405-bed9-22e4e3abdc2e/34668231111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b01345a-09ea-4451-b1cf-4b9e5b360b50/56433684568.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/zorba_the_greek_book_critical_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/307a60cf-7497-4ab4-9607-89b1b61d9a88/bejanewase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7b1a66-bac2-4f12-844f-2cca8db930ca/where_is_my_starter_relay_located.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1288b4e9-b380-48e2-a117-a24e56e79d98/pexafasozetemetuwojilix.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_off0000f381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF381 5572 bytes
SHA-256: 7b17eeae0e3b419a83a87cb838538145423fc08b93632f374e3e6558e3962bd1
font_01_sfnt_off0001065d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065D 11200 bytes
SHA-256: ecbe401ff5fd37b9651cfd463cd85422304a9a95abc6f1e633ac4fc95172eb20

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