Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb95cc7f30783b3…

MALICIOUS

PDF

79.7 KB Created: 2021-03-17 21:12:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00545676f86ac3b54939c790a284884e SHA-1: 7503ff689891bfb7b275f7279465f89515eb5c19 SHA-256: adb95cc7f30783b3e5d9886a861de1bbca69dcdf557c6cd85e268cbf5901f67e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The embedded URL `https://soxebez.ru/strik?utm_term=how+to+fix+sound+delay+on+sony+bravia+tv` further supports this, as it appears to be a lure related to a common technical issue. ClamAV detection and ML classification confirm the malicious nature of the PDF, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/strik?utm_term=how+to+fix+sound+delay+on+sony+bravia+tv
    • https://cdn.sqhk.co/kitolitik/3jjoxie/suxasupinagakabu.pdf
    • https://cdn.sqhk.co/motanunika/qjfgge1/34859058395.pdf
    • https://cdn.sqhk.co/fuvebopeweb/x6hfhbZ/65504947940.pdf
    • http://btsworld.org/how_to_check_transmission_fluid_manualv6k7m.pdf
    • http://mesikigodijope.mypressonline.com/tonusadegowanurezafobam.pdf
    • https://cdn.sqhk.co/wusoxopejezo/jbhdjfj/73429280799.pdf
    • https://cdn.sqhk.co/mivadunoxo/O0mjjid/lirataj.pdf
    • https://cdn.sqhk.co/susojareb/hiLKrXb/kuwezesanesovo.pdf
    • http://gipovasota.sportsontheweb.net/sozawipebu.pdf
    • http://drive4mclaneeffingham.com/george_foreman_electric_indoor_outdoor_bbq_grill_reviewsqe8gk.pdf
    • http://tameenegypt.com/most_common_english_phrasesqs1tw.pdf
    • https://cdn.sqhk.co/reriwoduriju/e2MagjI/maren_morris_crowded_table_lyrics.pdf
    • https://cdn.sqhk.co/pozusonitid/nQXdihL/jejigebarozusetobagegani.pdf
    • http://lobabinuladeri.medianewsonline.com/vuridokufesefamalu.pdf
    • http://dowotezovemalo.mygamesonline.org/bailable_and_non_bailable_offence_crpc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_de9f613deb2d4208950e459785cd7f81.pdf?index=true
    • https://s3.amazonaws.com/ragejufa/saxitobunexibopadomer.pdf
    • http://gamelaluwer.myartsonline.com/hp_laserjet_p1102w_keeps_going_offline.pdf
    • https://5ec50ee2-6c76-415b-b731-82d7de26534b.filesusr.com/ugd/826e74_2f4ea5eda71a4922aa6cb769fce52dac.pdf?index=true
    • https://s3.amazonaws.com/wivunonovef/android_box_m8s_firmware_update.pdf
    • https://3eeb541e-75be-486c-a732-b1e279b2a932.filesusr.com/ugd/eaab1c_737f8f9ef5c14d9d8ba62e636440e60e.pdf?index=true
    • https://s3.amazonaws.com/mesixadelomomo/63344233879.pdf
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_7a2b496206274fbeb49524375f0f9734.pdf?index=true
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_b91e8b4a4bfa453fbed5f2c5c01816bc.pdf?index=true
    • https://s3.amazonaws.com/fibesezati/98089482245.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f56e.bin
3221176746f8350682738cb0a5a57b2d314fd2a7eea9baec6ee908f9ee624f53
pdf-font-stream PDF embedded font (sfnt) at offset 0xF56E 5324 bytes
font_01_sfnt_off000107b2.bin
ee36e619b94bd5808830e8922d1ddba10896de37c83c2374781572f3c2879078
pdf-font-stream PDF embedded font (sfnt) at offset 0x107B2 11588 bytes