Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3aae69136b69223…

MALICIOUS

PDF

81.7 KB Created: 2021-03-15 15:14:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0673d4c71af0d5fb67414ad649f672e4 SHA-1: db69f3ba9bc774d5f4ea7239bcae9ba692b9bc9f SHA-256: e3aae69136b6922338f637540dc97fe9711f12b2d04de9dcf137cf005a6bb574
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with spearphishing attachments used to redirect victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/wix?keyword=marriage+in+india+divorce+in+usa PDF link annotation
    • https://wotilawijuv.weebly.com/uploads/1/3/4/8/134852567/kupisel_siboroxola.pdfIn PDF document text
    • https://jigugelelatowo.weebly.com/uploads/1/3/1/4/131437208/juxegasigi.pdfIn PDF document text
    • http://trelon.fun/introductory_chemistry_6th_edition_nivaldo_j_tro26th8.pdfIn PDF document text
    • https://jategolotigani.weebly.com/uploads/1/3/4/8/134882723/2606529.pdfIn PDF document text
    • https://naxosetoj.weebly.com/uploads/1/3/0/7/130775404/rezudaparigupotuwi.pdfIn PDF document text
    • https://rajopolaxobi.weebly.com/uploads/1/3/1/4/131406270/03dd60e2da87.pdfIn PDF document text
    • http://khareedforosh.com/guvuboxawukoruzusola33m42.pdfIn PDF document text
    • https://lulaxifijugom.weebly.com/uploads/1/3/0/7/130776747/pugixireb-galukezev.pdfIn PDF document text
    • https://sawamamuwez.weebly.com/uploads/1/3/5/9/135992332/a8207f074b2.pdfIn PDF document text
    • https://kaxojolomo.weebly.com/uploads/1/3/4/8/134885197/jokimite.pdfIn PDF document text
    • http://rafewasugajeze.22web.org/livre_sur_les_nergies_renouvelables.pdfIn PDF document text
    • http://gigaxoninijubad.iblogger.org/bansidhar_ke_bhojpuri_video_mp4.pdfIn PDF document text
    • https://voloripilobolim.weebly.com/uploads/1/3/4/6/134635915/kuzaxebojo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://binefiwir.rf.gd/credit_risk_analytics_in_r.pdfIn PDF document text
    • http://xofogijatoli.epizy.com/dynamics_nav_2018_cu5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903ae4fb-ad11-4f74-8158-42ca54ddea5b/what_do_the_colors_of_the_sunset_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99cde06d-4102-4ef6-9c31-e04f3a31b817/conditional_sentence_exercises.pdfIn PDF document text
    • http://wazisosixi.epizy.com/ismart_shankar_dj_audio_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a824b268-e52e-4a49-82e9-23c46466e05e/45140126602.pdfIn PDF document text
    • http://kutelitowolobe.rf.gd/invitation_to_psychology_7th_edition.pdfIn PDF document text
    • http://lepejifilafimif.rf.gd/spurt_of_blood_artaud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b58917-efe1-48d2-ac91-87ccbc86590d/how_to_fix_a_furnace_pilot_light.pdfIn PDF document text
    • http://latilofu.rf.gd/xemutogimofizoxinaruza.pdfIn PDF document text
    • http://rozosijamuruxo.rf.gd/rival_microwave_mute.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_off00010312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10312 5140 bytes
SHA-256: 12f9a9f71b54ad122b27b41c2adafe7c9b5e64c07c906fe2f2d4bf5ed66f3d30
font_01_sfnt_off000114af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AF 10800 bytes
SHA-256: c589a5aa05510787ce9b8a1689c1b7edc14b0829dce9853b443ad467f2f3bb83

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