Malicious PDF — malware analysis report

Static analysis result for SHA-256 49980a00399b8020…

MALICIOUS

PDF

75.2 KB Created: 2021-03-14 04:04:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 21b7ab1b21862d61bb068cc76d648dec SHA-1: 221e657b6017a0390b104a952186af596288a4f5 SHA-256: 49980a00399b8020c0bb78e3c41ea5603bd27d7595705e2b7127665445951b71
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, including one to 'nipisod.ru', suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be a lure related to a technical query, likely intended to drive traffic to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://nipisod.ru/strik?utm_term=why+is+my+samsung+gas+dryer+not+heating PDF link annotation
    • https://cdn.sqhk.co/jasolizilaf/jbcFzTV/w_radio_martha_debayle_estacion.pdfIn PDF document text
    • http://evromotors.net/mixuvobenem1ydos.pdfIn PDF document text
    • https://gesojotumone.weebly.com/uploads/1/3/4/6/134614539/vudibabu.pdfIn PDF document text
    • https://kasesutibut.weebly.com/uploads/1/3/4/0/134017634/wopabik.pdfIn PDF document text
    • http://copyright-securityx.com/jisitogudisudedumukekemekmqk7j.pdfIn PDF document text
    • https://cdn.sqhk.co/bevibubos/ePacjaW/virgin_pulse_discount_code_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rowunozimop/jag0ljb/todaroditexe.pdfIn PDF document text
    • https://cdn.sqhk.co/bowevuva/ejavPBh/the_academy_the_first_riddle_apk_obb.pdfIn PDF document text
    • https://zelekunidos.weebly.com/uploads/1/3/2/6/132682808/ropazarap.pdfIn PDF document text
    • http://bokulidedasez.22web.org/70195050337.pdfIn PDF document text
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/vatawisipajipap.pdfIn PDF document text
    • http://petrol-v-pol-price.site/349391806843ixbe.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/6192328.pdfIn PDF document text
    • http://eroganoficial.site/24715675766af9v6.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/7igrEja/dark_blue_runner_rug.pdfIn PDF document text
    • https://kazirevuteguzug.weebly.com/uploads/1/3/2/6/132681824/6643105.pdfIn PDF document text
    • http://mp4.design/how_to_drain_water_from_lg_top_load_automatic_washing_machinek164a.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/sojaxub/wodanimulegiwewurekufe.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/ap_lang_sample_argument_essays.pdfIn PDF document text
    • http://lakelasu.rf.gd/69727963850.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/leriturewunerabupuliz.pdfIn PDF document text
    • http://buzuxujov.epizy.com/69166813480.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/how_to_become_a_cosmetic_tattooist.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/properties_of_exponents.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_off0000e7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FF 5324 bytes
SHA-256: 4cf78c1f5d8f01ecea286ec04f0c7667cd7abc913740253f66801bd548bce0c0
font_01_sfnt_off0000fa00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA00 10868 bytes
SHA-256: cbaf08d6c18ea1220805e0e61829f11fe201a1e97f80d698aee853330fd4f94d

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