Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c9f7c0a280e20d…

MALICIOUS

PDF

75.7 KB Created: 2021-03-24 13:43:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0dc9c8600ab7b5a37f3f6ec28ffa6e0e SHA-1: 9b5a7aca7e90a81f749a6119085a52a61fb008aa SHA-256: 19c9f7c0a280e20d226e9bbd0b6b88250f38805d525eb03f296119fc735bdb46
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and contains multiple external URIs, including one on a disposable hosting domain with UTM parameters. The PDF structure and embedded links suggest a phishing or malware distribution attempt, likely using a link farm to obscure the final malicious destination. No scripts were extracted, but the presence of numerous suspicious URLs points to a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://mezovuduw.ru/123?utm_term=audacity+plugins+effects PDF link annotation
    • http://gajonedorebuko.mywebcommunity.org/gizixakitofuda.pdfIn PDF document text
    • http://vegofejolafud.mygamesonline.org/72117718525.pdfIn PDF document text
    • https://leludexubivavij.weebly.com/uploads/1/3/1/8/131860378/5462582.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416493/normal_5ff4275d4c1c1.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/b9ccd36.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/frigidaire_refrigerator_replacement_door_handle7ffml.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462974/normal_5ffa5d7086c92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_605b0d77a15de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412607/normal_603bff95d5932.pdfIn PDF document text
    • http://hhizmet.com/can_i_get_xfinity_on_rokugtb1u.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/495f7f7b-8523-47e7-aabb-df448a947e46/playing_card_maker_crossword_clue_6_letters.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/men_s_style_guide_instagram.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/3621745095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f1ff2f-bc3f-4a11-8a49-a618aa8b4589/44550399384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7911bb8-adc1-4b2b-8447-d07f19e762e8/seated_resistance_band_exercises_for_elderly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87d24bb7-a39d-448b-b337-28a4a23b1d0d/rancilio_silvia_cleaning_descaling.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/52022862421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a774f4ab-365a-4886-a96c-932f1199d358/customer_services_manager_job_description.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_off0000eb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB31 5316 bytes
SHA-256: cc0a255317d75083a3890aba26b8388627921a16700bf18ee5581921936189c2
font_01_sfnt_off0000fd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6D 10692 bytes
SHA-256: 94b8c43e9ebbdd895bba4bb5a2e5d68719cc6fdc1f34a5026bbae9f506d00ccf

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