Malicious PDF — malware analysis report

Static analysis result for SHA-256 9012a2ee6631f1aa…

MALICIOUS

PDF

145.5 KB Created: 2021-01-23 21:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7668248c018a4791950ae275038b9465 SHA-1: 2a44cb74a8dbb88c7ef2d49dec25b2c02c6b3567 SHA-256: 9012a2ee6631f1aadd2e414a97dd8ede3afb4caa12bde570080c1709502afe84
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of a UTM term in one of the URLs points towards tracking user interactions, potentially for phishing or advertising fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

Heuristics 6

  • 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.
  • 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://jottigo.ru/123?utm_term=triangle+two+column+proofs+worksheet+with+answers PDF link annotation
    • https://site-1248237.mozfiles.com/files/1248237/26346608725.pdfIn PDF document text
    • https://mikezibe.weebly.com/uploads/1/3/1/4/131453119/86179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502436/normal_5fe7bdd00c564.pdfIn PDF document text
    • https://betirowi.weebly.com/uploads/1/3/4/6/134661799/newiwogaforived-xususej-padewoxo-detazarod.pdfIn PDF document text
    • https://site-1176998.mozfiles.com/files/1176998/jaxenofiraluge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453729/normal_5ffaccfde8053.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486521/normal_5ff94a4ec0e45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5fd0aef882001.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384142/normal_5ff1751066a6a.pdfIn PDF document text
    • https://dunawotota.weebly.com/uploads/1/3/1/4/131438316/wunokofonixizil.pdfIn PDF document text
    • https://vufumepuzatine.weebly.com/uploads/1/3/5/3/135335191/vajumotit_bonufuxugeli.pdfIn PDF document text
    • https://ruzamugube.weebly.com/uploads/1/3/4/0/134040566/zibixejevukemew.pdfIn PDF document text
    • https://site-1172627.mozfiles.com/files/1172627/xurawewo.pdfIn PDF document text
    • https://lulipexo.weebly.com/uploads/1/3/5/2/135294167/mosonijopimurugu.pdfIn PDF document text
    • https://fikakexuk.weebly.com/uploads/1/3/0/7/130775276/6057380.pdfIn PDF document text
    • https://felinabaf.weebly.com/uploads/1/3/4/3/134380667/zibupitezojuge_fumefezo_gubelolib_gusuluronasuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/ebay_uk_app_free_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/napa_air_compressor_oil_sds_sheet.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D65 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0001ae1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE1B 8372 bytes
SHA-256: 48ee89c544988e80c04bbaea716e7f6b92fce8a91343ce0041be8fd8806e76a0
font_02_sfnt_off0001ca6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA6F 5416 bytes
SHA-256: ed96fc5008110baf80f24e6b92c6bd388554710aa58a0883863652631676d658
font_03_sfnt_off0001dcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCBD 2212 bytes
SHA-256: 74b0f7db8d521f0ba138b1f7682b8c56bc480b077482435ba61c3944a6315d24
font_04_sfnt_off0001e6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E6D7 12748 bytes
SHA-256: a30e9d7bc82060795f7c3a8963b3d5f2f77bacf231349c26597eec3d01592734
font_05_sfnt_off00021256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21256 16300 bytes
SHA-256: 77694efdef2d866a271a58a8d5bf3c6347bb881788c8e33c650f28298d94da9d
font_06_sfnt_off0002281b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2281B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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